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OPERATING AND SERVICE MANUAL 



DIGITAL 

VOLTMETER 

3455A 






HEWLETT 

PACKARD 



-hp- 3455A 









HEWLETT 

PACKARD 



OPERATING AND SERVICE MANUAL 

MODEL 3455A 
DIGITAL VOLTMETER 



Serial Numbers: 1622A00I01 and Greater 
IMPORTANT NOTICE 

This loose leaf manual does not normally require a change sheet. All 
major charrge information has been integrated into the manual by 
page revision. In cases where only minor changes are required, 8 
change sheet rnay be suttplied. 

If the Serial Number of your instrument Is lower than the one on 
this title page, the manual contains revisions that do not apply to 
your Instrument. Backdatirtg information given in the manual adapts 
it to earlier instruments, 

Where practical, backdating Information Is Integrated into the text, 
parts list and schematic diagrams. Backdating changes are denoted 
by a delta sign. An open delta (A) or lettered delta (A^) on a given 
page, refers to the corresponding backdating note on that page. 
Backdating changes not integrated into the manual are denoted by 
a numbered delta <At I which refers to the corresponding change in 
the Backdatirtg section (Section VIO. 




To help minimize the possibility of electrics! fire or shock 
hazards, do not expose this instrument to rain or excessive 
moisture. 



Mtnual Part No. 03455-90003 
Microfiche Part No. 03455-90053 



(DCopyright Hewlett-Packard Company 1976 
P.O. Box 301, Loveland, Colorado, 80537 U.S.A. 



Printed: July 1979 





Who\ HEWLETT 
%LfiM PACKARD 



CERTIFICATION 

Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the 
factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United Slates Ha- 
lional Bureau of Standards, to the extent allowed by the Bureau 's calibration facility, and to the calibration facilities 
of other International Standards Organization members. 

WARRANTY 

This Hewlett-Packard product is warranted against defects in material and workmanship for a period of one year 
from date of shipment (.except that in the case of certain components listed in Section I of this manual, the warranty 
shall be for the specified period] . During the warranty period, Hewlett-Packard Company will, at its option, either 
repair or replace products which prove to be defective. 

For warranty service or repair, this product must be returned to a service facility designated by -hp-. Buyer shall 
prepay shipping charges to -hp- and -hp- shall pay shipping charges to return the product to Buyer. However, Buyer 
shall pay all shipping charges, duties, and taxes for products returned to -hp- from another country. 

Hewlett-Packard warrants that its software and firmware designated by -hp- for use with an instrument will execute its 
programming instructions when properly installed on that instrument. Hewlett-Packard does not warrant that the 
operation of the instrument, or software, or firmware will be uninterrupted or error free. 

LIMITATION OF WARRANTY 

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, 
Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental 
specifications for the product, or improper site preparation or maintenance. 

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY 
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
PURPOSE. 

EXCLUSIVE REMEDIES 

THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES. HEWLETT- 
PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT. SPECIAL. INCIDENTAL. OR CONSE- 
QUENTIAL DAMAGES. WHETHER BASED ON CONTRACT. TORT. OR ANY OTHER LEGAL THEORY. 

ASSISTANCE 

Product maintenance agreements and other customer assistance agreements are available 
for Hewlett-Packard products. 

For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. 
Addresses are provided at the back of this manual. 



10 / 1 / 7 * 



Model 3455A 



Table of Contents 



TABLE OF CONTENTS 



Section Page 

I. GENERAL INFORMATION 1-1 

1-1. Introduction 1-1 

1-5. Specifications 1-1 

1-7. Instrument and Manual Identification . . . I-l 

1-11. Description 1-1 

1-13. Options 1-1 

1-15. Accessories Supplied 1-1 

1-17. Accessories Available 1-1 

1-19. Recommended Test Equipment 1-1 



Section Page 

II. INSTALLATION 2-1 

2-1. Introduction 2-1 

2-3. Initial Inspection 2-1 

2-5. Preparation for Use 2-1 

2-6. Power Requirements 2-1 

2-8. Line Voltage Selection 2-1 

2-10. Power Cable 2-1 

2-12. Grounding Requirements 2-1 

2-14. Bench Use 2-1 

2-16. Rack Mounting 2-2 

2-18. Interface Connections 2-2 

2-22. Environmental Requirements 2-2 

2-23. Operating and Storage Temperature. . .2-2 

2-26. Humidity 2-3 

2-28. Altitude 2-3 

2- 30. Repackaging for Shipment 2-3 

Section Page 

111 OPERATING INSTRUCTIONS 3-1 

3- 1. Introduction 3-1 

3-3. Operating Characteristics 3-1 

3-4. Turn-On and Warm-Up 3-1 

3-6. Self-Test Operation 3-1 

3-10. DC Voltage Measurement 3-1 

3-12. Resistance Measurement 3-2 

3-14. AC Voltage Measurement 3-2 

3-19. Math Feature 3-3 

3-23. Enter and Store 3-4 

3-27. High Resolution Mode 3-4 

3-29. Auto-Cal 3-5 

3-33. Trigger 3-5 

3-36. Sample Rate 3-5 

3-38. Auto Range 3-6 

3-41. Guarding 3-6 

3-42. Common-Mode Voltages 3-6 

3-44. Guard Connection 3-6 

3-46. Guarding Information 3-6 

3-48. Remote Operation 3-7 

3-49. General 3-7 

3-53. Address Selection 3-7 

3-56. Program Codes 3-8 

3-61. Data Messages 3-9 

3-69. Device Control Messages 3-12 

3-78. Interrupt and Device Status 

Messages 3-12 



3-82. Data Output Characteristic 3-13 

3-84. Bail Out Message 3-13 

3-86. Instrument Measurement Times 

(Remote Control) 3-13 

3-88. Remote Programming Examples 3-14 

3-90. Operators Checks 3-14 

3-92. Bench Use 3-14 

3- 94. HP-IB Operation 3-14 

Section Page 

IV. PERFORMANCE TESTS 4-1 

4- 1. Introduction 4-1 

4-3. Equipment Required 4-1 

4-5. Performance Test Card 4-1 

4-7. Calibration Cycle 4-1 

4-9. Input Terminals/Control Settings 4-1 

4-11. Performance Test Failure 4-1 

4-13. Specification Breakdown 4-1 

4-17. I>C Accuracy Test Considerations 4-2 

4-26. Operational Verification Tests 4-3 

4-27. DC Operational Accuracy Test 4-3 

4-30. Test Procedure 4-3 

4-31. AC Operational Accuracy Test 4-5 

4-34. Test Procedure 4-5 

4-35. Ohmmeter Accuracy Test 4-8 

4-37. Test Procedure 4-8 

4-38. DC Voltmeter Input Resistance Test. . . .4-9 

4-39. Performance Test 4-9 

4-40. DC Voltmeter Accuracy Test 4-9 

4-43. Test Procedure 4-10 

4-44. C Voltmeter Accuracy Test 4-12 

4-47. Test Procedure 4-12 

4-48. Ohmmeter Accuracy Test 4-16 

4-50. Test Procedure 4-16 

4-51. Common-Mode and Normal-Mode 

Rejection Test 4-17 

4-54. Test Procedure 4-17 

4-55. DC Voltmeter Input Resistance 

Test 4-18 

4- 56. AC Voltmeter Input Impedance 

Test 4-19/4-20 

Section Page 

V. ADJUSTMENTS 5-1 

5- 1. Introduction 5-1 

5-3. Equipment Required 5-1 

5-5. Adjustment Interval 5-1 

5-7. Adjustment Sequence .5-1 

5-9. Test Point and Adjustment Locations. . .5-1 

5-11. DC Zero Adjustments 5-1 

5-12. DC and Ohms Reference Adjustments. . .5-2 

5-14. Adjustment Procedure 5-2 

5-15. RMS Convertor Adjustments 

(Standard Model 3455A Only) 5-3 

5-16. Average Convertor Adjustments 

(345SA Option 001 Only) 5-4 

5-18. Adjustment Procedure 5-4 



iii 




Table of Contents 



Model 3455A 



TABLE OF CONTENTS (Cont'd) 



Section Page 

VI. REPLACEABLE PARTS 6-1 

6-1. Introduction 6-1 

6-4. Ordering Information 6-1 

6-6. Non-Listed Parts 6-1 

6-8. Parts Changes 6-1 

6-10. Proprietary Parts 6-1 

6-12. Exchange Assemblies 6-2 

6- 15. Service Kit 6-2 

Section Page 

VII. MANUAL CHANGES 7-1 

7- 1. Introduction 7-1 

Section Page 

VIII. SERVICE 8-1 

8- 1 Introduction 8-1 

8-3. Safety Considerations 

8-8. Recommended Test Equipment 8-1 

8-10. Introduction 8-2 

8-12. Input Switching and DC Attenuator. . .8-2 

8-13. General 8-2 

8-15. Detailed Description 8-2 

8-17. Operational Attenuator 8-2 

8-19. Auto Calibration-DC Voltage 8-2 

8-20. General 8-2 

8-22. Circuit Description 8-4 

8-34. Auto-Calibration-Ohms 8-9 

8-35. General 8-9 

8-37. Circuit Description 8-9 

8-42. Auto Calibration-A/D Convertor. . . .8-10 

8-44. Circuit Description 8-11 

8-47. True RMS AC Convertor 8-11 

8-48. General 8-11 

8-50. Circuit Description 8-11 

8-56. Average Responding AC Convertor 

(Option 001) 8-12 

8-57. General 8-12 

8-59. Circuit Description 8-12 

8-65. Ohms Convertor 8-13 

8-66. General 8-13 

8-68. General Description 8-13 

8-73. DC Preamplifier 8-14 

8-74. General 8-14 

8-76. Circuit Description 8-14 

8-82. Reference Assembly 8-16 

8-83. General 8-16 

8-85. Circuit Description 8-16 

8-87. Analog-to-Digital Convertor (A/D).. 8-16 

8-88. General 8-16 

8-92. Circuit Description 8-17 

8-103. Inguard Controller 8-19 

8-104. General 8-19 

8-107. Circuit Description 8-19 

8-M5. Main Controller 8-22 

8-116. General 8-22 



8-118. Circuit Description 8-23 

8-141. HP-IB Circuit 8-29 

8-142. General 8-29 

8-144. Circuit Description 8-29 

8-168. Front Panel Operation 8-32 

8-169. Circuit Description 8-32 

TROUBLESHOOTING 

8-174. Introduction 8-35 

8-176. General Block Diagram Theory 

of Operation 8-35 

8-179. Outguard Section 8-35 

8-185. Inguard Section 8-36 

8-194. Preliminary Troubleshooting Check.. 8-36 
8-195. Instrument Half-Splitting 

Techniques 8-36 

8-198. Service Group Summary 8-37 

SERVICE GROUP A 

8-A-l Turn-On Circuitry (Inguard and 

Outguard) 8-40 

8-A-3. Inguard/Outguard Isolation 8-40 

8-A-5. Outguard Troubleshooting 

(Schematic 8) 8-40 

8-A-6. Inguard Troubleshooting 

(Schematic 5, 6, 7) 8-40 

8-A-8. AlO Motherboard Troubleshooting 

(Schematic 5, 6, 7) 8-40 

8-A-lO. A/D Board Troubleshooting 

(Schematic 5, 6) 8-41 

8-A-12. Inguard/Outguard Transfer Circuit 

Troubleshooting (Schematic 7,8) 8-41 

SERVICE GROUP 6 

8-B-l. Auto-Cal and DC Troubleshooting 

(Inguard) 8-43 

8-B-3. Auto-Cal Constants 8-43 

8-B-9. Auto-Cal Switch Closures 

(Schematic 1, 5, 6, 7) 8-50 

8-B-l I . Cal Constants Service Procedure 8-50 

8-B-14. Switch Closure Table 8-52 

8-B-16. Auto-Cal Troubleshooting 

(Schematic I, 7) 8-52 

8-B-18. DC Inoperative (Schematic 1) 8-54 

8-B-20. Leakage and Other Various 

Malfunctions 8-54 

8-B-23. 10 V Range or Constant 10 and 11 Fail. . .8-55 

8-B-24. 1 V Range or Constant 0, I , and 2 Fails . . 8-55 

8-B-25. 100 mV Range or Constant 3 Fails 8-55 

8-B-26. 100 V Range or Constants 5, 4, and 7 

Fail 8-55 

8-B-27. 10(X) V Range or Constant 6 Fails 8-56 

8-B-28. Various Other Malfunctions 8-56 

8-B-30. Other Troubleshooting Hints 8-57 

8-B-3I. General Noise 8-57 

8-B-33. IX: Noise (Schematic 1, 5. and 6) 8-57 



iv 




Model 3455A 



Table of Contents 



TABLE OF CONTENTS (Cont'd) 



SERVICE GROUP C 



8-C-l. AC Convertor Troubleshooting 8-59 

8-C-2. True RMS Convertor Servicing 

(Schematic 3) 8-59 

8-C-4. Preamplifier and Input Alternator 

Circuitry 8-60 

8-C-6. Absolute Amplifier Circuitry 8-61 

8-C-8. Squaring Amplifier, Intergrator, and 

Antilog Circuitry 8-61 

8-C-IO. AC/DC Operation 8-62 

8-C-12. AC Noise (Schematic 3) 8-62 

8-C-16. Miscellaneous Troubleshooting 

(Schematic 3) 8-63 

8-C-17. Average Responding AC Convertor 

(Schematic 2) 8-64 

SERVICE GROUP D 

8-D-l. Ohm Troubleshooting (Schematic 1,4).. .8-65 

8-D-2. Ohms Circuit Isolation 8-65 

8-D-4. Ohms Servicing 8-65 

8-D-6. Ohms Convertor Troubleshooting 

(Schematic 1, 4) 8-65 

8-D-8. Miscellaneous Ohms Troubleshooting 

Hints 8-66 

8-D-9. Ohms Offsets 8-66 

8-D-ll. Ohms Noise (Schematic 1,4) 8-67 



SERVICE GROUP E 

8-E-l. A/D Convertor and Inguard Logic 



Troubleshooting 8-68 

8-E-2. A/D Convertor Servicing 

(Schematic 6, 7) 8-68 

8-E-4. No A/D Waveform 8-69 

8-E-6. Incorrect A/D Waveform 8-69 

8-E-7. Correct A/D Waveform 8-69 

8-E-8. A/D Noise (Schematic 6) 8-70 

8-E-lO. Inguard Logic Troubleshooting 

(Schematic 7) 8-70 



8-E-12. Inguard Logic Troubleshooting with 

no A/D Waveform 8-70 

8-E-I3. Inguard Logic Troubleshooting with 

an A/D Waveform 8-72 

SERVICE GROUP F 

8-F-l. Outguard Logic Troubleshooting 

(Schematic 8, 9, 10) 8-73 

8-F-3. Main Controller Troubleshooting 

(Schematic 8) 8-73 

8-F-4. Front Panel Troubleshooting 8-73 

8-F-5. Front Panel Operation Check 8-73 

8-F-6. Front Panel Servicing (Schematic 10). . . .8-74 

8-F-7. Front Panel LED’s Switch, and Key 

Cap Replacement Procedure 8-74 



8-F-8. HP-IB Troubleshooting (Schematic 9). . .8-75 
SERVICE GROUP 6 

8-G-l. Miscellaneous Troubleshooting 8-76 

8-G-2. Power Supplies (Schematic 11) 8-76 

8-G-3. Reference Assembly (Schematic 5) 8-76 

8-G-4. Turn-Over Errors (Schematic 1, 5, 

and 6) 8-77 

8-G-6. Other Troubleshooting (Schematic 8 

and 11) 8-77 

SERVICE GROUP H 

8-H-l . T roubleshooting Diagrams 8-78 

8-H-3. General Troubleshooting Diagram 8-78 

8-H-4. Inguard Troubleshooting Diagram. 8-8 1/8-82 
8-H-6. Outguard Troubleshooting 8-117/8-118 

APPENDIX 

Page 



A-1. Introduction A-1 

A-4. Program Example #1 A-1 

A-5. Program Example #2 A-2 



LIST OF TABLES 



Table Page 

1-1. Specifications 1-2 

1-2. Typical Operating Charaaeristics 1-4 

1-3. Recommended Test Equipment 1-6 

3-1. Maximum Front Panel Reading Rates 3-6 

3-2. HP-IB Interface Capability 3-7 

3-3. Bus Messages 3-8 

3-4. HP-IB Program Codes 3-9 

3-5. Binary Program Codes 3-11 

3- 6. Typical HP-IB Controlled Meassurement 

Times 3-14 

4- 1. DC Accuracy Test (1 V, 10 V Full Scale; 

High Resolution On) 4-3 



Table Page 

4-2. DC Accuracy Test (High Resolution Off). . .4-5 
4-3. DC Accuracy Test (High Resolution On). . .4-5 
4-4. AC Accuracy Test 30 Hz to 100 kHz 

(Standard Model 3455 A only) 4-7 

4-5. AC Accuracy Tests 100 kHz to 1 MHz 

(Standard Model 3455 A only) 4-7 

4-6. AC Accuracy Test 30 Hz to 100 kHz 

(3455 A Option 001 only) 4-8 

4-7. Two-Wire Ohm Accuracy Test 4-8 

4-8. Four-Wire Ohms Accuracy Test 4-9 

4-9. DC Accuracy Test (1 V, 10 V Full-Scale; 

High Resolution OfO 4-10 



V 




Table of Conienis 



Model 3455A 



LIST OF TABLES (Cont'd) 



Table Page 

4-10. DC Accuracy Test (1 V, 10 V Full Scale; 

High Resolution On) 4-10 

4-11. DC Accuracy Test (High Resolution OfO. - ^11 

4-12. DC Accuracy Test (High Resolution On). .4-11 

4-13. AC Accuracy Test 30 Hz to 100 kHz 

(Standard Model 34SSA only) 4-14 

4-14. AC Accuracy Test 100 kHz to 1 MHz 

(Standard Model 34SSA only) 4-IS 

4-15. AC Accuracy Test 30 Hz to 100 kHz 

(Model 345SA Option 001 only) .4-15 

4-16. Two-Wire Ohm Accuracy Test 4-16 

4- 17. Four-Wire Ohms Accuracy Test 4-17 

5- 1. DC Zero Adjustment Padding List 

(AlORllO) 5-2 

5-2. Jumper Removal (A15 Board) 5-4 

5-3 . Jumper Removal (A 1 3 Board) 5-4 



6-1. Standard Abbreviations 6-1 

6-2. Code List of Manufacturers 6-2 

6-3. Replaceable Parts 6-3 

8-1. AC Convertor Ranging 8-11 

8-2. A/D Convertor Switch Control Signal 

Descriptions 8-21 

8-3. Service Group Listing 8-38 

8-B-l. Auto-Cal Constants 8-43 

8-B-2. Auto-Cal Switch Closures 8-50 

8-B-3. Gate Function in Auto-Cal 8-51 

8-B-4. Switch Driver Voltage Levels 8-51 

8-B-5. Cal Constant Monitoring Points. 

8-B-6. 3455 A DVM Switch Closures 8-53 

8-B-7. Possible Auto-Cal Failure Causes 8-54 

8-D-l. Ohms Gain and Switch Configuration. . . .8-66 

8-E-l. Mneumonic Definitions 8-71 

8-G-l. Power Supplies Locations 8-76 



LIST OF ILLUSTRATIONS 



Figure Page 

2-1. Line Voltage Selection 2-1 

2-2. Power Cord Configuration 2-1 

2- 3. Typical HP-IB System Interconnections. . , .2-2 

3- 1. Front and Rear Panel Features 3-0 

3-2. Ohmmeter Measurement Connections 3-2 

3-3. Connecting the Guard 3-7 

3-4. Address Selection 3-8 

3- 5. Operational Verification Flowchart. .3-15/3-16 

4- 1. Ambiguous Regions 4-3 

4-2. DC Accuracy Test 4-4 

4-3. AC/E>C Thermal Transfer Measurement 

(Alternate Frequency Response Test). . . .4-6 

4-4. DC Accuracy Test 4-11 

4-5. AC/DC Thermal Transfer Measurement 

(Alternate Frequency Response Test). . .4-13 
4-6. DC Common-Mc^e Rejection Test 4-18 

4- 7. AC Common-Mode Rejection Test 4-18 

5- 1. 100 Volt Zero Adjustment 5-1 

5-2. 1 Volt Zero Adjustment 5-2 

8-1. Function Block Diagram 8-1 

8-2. Simplified Input Switching Diagram 8-2 

8-3. Operational Attenuator Diagram 8-3 

8-4. Basic Voltmeter Diagram 8-3 

8-5. Simplified Auto-Cal Switching Schematic. .8-3 

8-6. 10 V dc Input Offset Error measurement. . .8-4 

8-7. 1 V dc Input Offset Error Measurement. . . .8-4 

8-8. .1 V dc Input Offset Error Measurement. . .8-5 

8-9. 100 V dc and 100 V dc Input Offset 

Error Measurement 8-6 

8-10. 10 V dc Gain Error Measurement 8-6 

8-11. .1 V dc and 1 V dc Gain Error 

Measurement 8-7 

8-12. 1 V dc Reference Offset Error 

Measurement 8-7 

8-13. 100 V dc and 1000 V dc Gain Error 

Measurement 8-8 



8-14. 100 V dc Reference Offset Error 

Measurement 8-8 

8-15. Basic Ohms Measurement Diagram 8-9 

8-16. 10 kO. 100 kft, 10 MO Offset Error 

Measurement 8-9 

8-17. Ohms Reference Measurement 8-10 8-10 

8-18. Simplified A/D Convertor Diagram 8-10 

8-19. Simplified True RMS Convertor 8-11 

8-20. Simplified Average Responding AC 

Convertor 8-12 

8-21. Ohms Convertor Current Source 8-13 

8-22. Ohms Convertor Voltage Limit 8-14 

8-23. Equivalent DC Preamplifier Output 

Circuit 8-15 

8-24. DC Preamp, Simplifier Feedback 

Circuitry 8-15 

8-25. Simplified Voltage Reference Diagram. . . .8-16 

8-26. Integrator Output Waveform 8-16 

8-27. Integrator Output Waveforms for 

Different Input Voltage Levels 8-17 

8-28. Simplified A/D Input and Reference 

Diagram 8-17 

8-29. Simplified A/D Convertor Diagram 8-18 

8-30. Simplified Inguard Controller 

Flowchart 8-19 

8-31. Controller Data Transfer Circuit 8-19 

8-32. Data Transfer Signals 8-20 

8-33. Inguard Controller Reset Circuit 8-20 

8-34. Simplified A/D Convertor Control Circuit8-21 

8-35. Simplified Program ROM Circuit 8-22 

8-36. Simplified Output Circuit 8-23 

8-37. Simplified Main Controller Flowchart. . . .8-24 

8-38. Main Controller ROM Circuit 8-25 

8-39. Main Controller RAM Circuit 8-26 

8-40. Main Controller ALU Circuit 8-27 

8-41. Main Controller Interrupt Circuit 8-28 

8-42. Simplified Turn-On Interrupt Circuit 8-29 



vi 




LIST OF ILLUSTRATIONS (Cont'd) 



8-43. Interface Connections and Bus Structure. .8-30 

8-44. Simplified Block Diagram 8-3S 

8-45. Inguard-Outguard Connections 8-37 

8-B-l. Auto-Cal Constant #11 (10 V Offset) 8-44 

8-B-2. Auto-Cal Constant #10 (10 V Gain) 8-44 

8-B-3. Auto-Cal Constant #9 (10 K. 100 K. 

and 10 M Offsets) 8-45 

8-B-4. Auto-Cal Constant #8 (10 K, 100 K. 

and 10 M Offsets) 8-45 

8-B-5. Auto-Cal Constant #7(100 V Offset #2). . .8-46 

8-B-6. Auto-Cal Constant #6 (1000 V Offset) 8-46 

8-B-7. Auto-Cal Constant #5 (100 V Gain) 8-47 

8-B-8. Auto-Cal Constant #4 (100 V Offset #1). . .8-47 

8-B-9. Auto-Cal Constant #3 (.1 V Offset) 8-48 

8-B-lO. Auto-Cal Constant #2 (1 V Offset I) 8-48 

8-B-ll. Auto-Cal Constant#! (IV Offset <2)....8-49 

8-B-I2. Auto-Cal Constant #0(1 V Gain) 8-49 

8-E-1. A/D Waveforms 8-68 

8-H-l. Assemble and Test Point Loading 8-79 

8-H-2. General Troubleshooting Procedure 

Diagram 8-79 

8-H-3. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 13 8-83/8-84 

8-H-4. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 12 8-85/8-86 

8-H-5. Inguard Troubleshooting Procedure 
Diagram Auto-Cal Circuitry 

TEST II 8-87/8-88 

8-H-6. Inguart Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 10 8-89/8-90 

8-H-7. Inguart Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 9 8-91/8-92 

8-H-8. Inguart Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 8 8-93/8-94 

8-H-9. Inguart Troubleshooting Procedure 
Diagram. Auto-Cal Circuitry 

TEST 7 8-95/8-96 

8-H-lO. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 6 8-97/8-98 

8-H-l 1. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 
TEST 5 8-99/8-100 



8-H-12. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 
TEST 4 8-101/8-102 



8-H-13. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 



TEST 3. 



8-H-14. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 2 8-I05/8-I06 

8-H-15. Inguard Troubleshooting Procedure 
Diagram. Auto-Cal Circuitry 

TEST 1 8-107/8-108 

8-H-I6. Inguard Troubleshooting Procedure 
Diagram, Auto-Cal Circuitry 

TEST 0 8-109/8-110 

8-H-17. Inguard Troubleshooting Procedure 

Diagram, Inguard/Outguard Transfer 

Circuitry 8-111/8-112 

8-H-18. Inguard Troubleshooting Procedure 
Diagram, Power Supply and 

Controller Circuitry 8-113/8-114 

8-H-19. Inguard Troubleshooting Procedure 
Diagram. A-to-D Convertor 

Circuitry 8-115/8-116 

8-H-20. Preliminary Outguard Troubleshooting 

Procedure Diagram 8-119/8-120 

8-H-21. Outguard Troubleshooting Procedure 
Diagram, Main Controller 
Circuitry 8-121/8-122 

8-H-22. Outguard Troubleshooting Procedure 

Diagram, RAM Circuitry 8-123/8-124 

8-H-23. Outguard Troubleshooting Procedure 

Diagram, ALU Circuitry 8-125/8-126 

8-H-24. Outguard Troubleshooting Procedure 
Diagram, Device Select 

Circuitry 8-127/8-128 

8-H-25. Outguard Troubleshooting Procedure 

Diagram, Interrupt Circuitry. . .8-129/8-130 
8-H-26. Outguard Troubleshooting Procedure 

Diagram, Display Circuitry 8-131/8-132 

8-H-27. Outguard Troubleshooting Procedure 

Diagram, HP-IB Circuitry 8-133/8-134 

8-H-28. Detailed Block Diagram 8-135 

8-H-29. Input and Auto-Cal Switching 

Schematic 8-147/8-148 

8-H-30. Average Responding AC Convertor 
8-149/8-150 
8-H-31. True RMS AC Convertor 

Schematic 8-151/8-152 

8-H-32. Ohms Convertor Schematic 8-153/8-154 

8-H-33. Reference Assembly 8-157/8-158 

8-H-34. Analog-to-Digital Convertor 

Schematic 8-159/8-160 

8-H-35. Inguard Controller Schematic 8-161 

8-H-36. Main Controller Schematic 8-167/8-168 

8-H-37. HP-IB Schematic 8-169/8-170 

8-H-38. Front Panel Assembly 8-171/8-172 

8-H-39. Power Supply Schematic 8-173/8-174 



vii 



8-103/8-104 




TJS% HEWLETT 
PACKARD 



SAFETY SUMMARY 

TIm failnviRQ Rtittral Mfaty pracMtiMt mutt ba abaarvad during all phaaaa af aparatian, aarvica. and rapair af thia 
initrumant Failara ta camply with thasa praeaatiaaa ar with tpacrfic warnings alsawhara in this manual violatas 
safaty standards af dasign, manafsetara, and intandad usa of tha instruawnt Hawlatt Packard Company assumas no 
liability for tha customar's failara ta comply with thasa raqairamants. This is a Safaty Clau 1 instramant 

GROUND THE INSTRUMENT 

To minimize shock hazard, the instrument chassis and cabinet must be connected to an elec- 
trical ground. The instrument is equipped with a three-conductor ac power cable. The power 
cable must either be plugged into an approved three-contact electrical outlet or used with a 
three-contact to two-contact adapter with the grounding wire (green) firmiy connected to an 
electrical ground (safety ground) at the power outlet. The power jack and mating plug of the 
power cable meet International Electrotechnical Commission (lEC) safety standards. 

00 NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE 

Do not operate the instrument in the presence of flammable gases or fumes. Operation of any 
electrical instrument in such an environment constitutes a definite safety hazard. 

KEEP AWAY FROM LIVE CIRCUITS 

Operating personnel must not remove instrument covers. Component replacement and internal 
adjustments must be made by qualified maintenance personnel. Do not replace components 
with power cable connected. Under certain conditions, dangerous voltages may exist even with 
the power cable removed. To avoid injuries, always disconnect power and discharge circuits 
before touching them. 

DO NOT SERVICE OR ADJUST ALONE 

Do not attempt internal service or adjustment unless another person, capable of rendering first 
aid and resuscitation, is present. 

DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT 

Because of the danger of introducing additional hazards, do not install substitute parts or per- 
form any unauthorized modification to the instrument. Return the instrument to a Hewlett- 
Packard Sales and Service Office for service and repair to ensure that safety features are main- 
tained. 

DANGEROUS PROCEDURE WARNINGS 

Warnings, such as the example below, precede potentially dangerous procedures throughout 
this manual. Instructions contained in the warnings must be followed. 




Dangerous voltages, capable of causing death, ore present in this instrument Use ai- 
trome caution whoa handling, testing, end adjusting. 

A 




SAFETY SYMBOLS 



General Definitions of Safety Symbols Used On Equipment or In Manuals. 







i OR 




77*7 X 




Instruction manual symbol: the product will be marked with this 
symbol when it is necessary for the user to refer to the instruction 
manual in order to protect against damage to the instrument. 

Indicates dangerous voltage (terminals fed from the interior by 
voltage exceeding 1000 volts must be so marked). 

Protective conductor terminal. For protection against electrical 
shock in case of a fault. Used with field wiring terminals to in- 
dicate the terminal which must be connected to ground before 
opierating equipment. 

Low-noise or noiseless, clean ground (earth) terminal. Used for a 
signal common, as well as providing protection against electrical 
shock in case of a fault. A terminal marked with this symbol must 
be connected to ground in the manner described in the installation 
(opierating) manual, and before operating the equipment. 

Frame or chassis terminal. A connection to the frame (chassis) of 
the equipment which normally includes all exposed metal struc- 
tures. 

Alternating current (power line). 

Direct current (power line). 

Alternating or direct current (power line). 



WARNING 1 






t 

1 

t 


^caution} 



The WARNING sign denotes a hazard. It calls attention to a pro- 
cedure, practice, condition or the like, which, if not correctly per- 
formed or adhered to. could result in injury or death to personnel. 

The CAUTION sign denotes a hazard. It calls attention to an 
operating procedure, practice, condition or the like, which, if not 
correctly performed or adhered to. could result in damage to or 
destruction of part or all of the product. 



NOTE: 



The NOTE sign denotes important information. It calls attention 
to procedure, practice, condition or the like, which is essential to 
highlight. 




Model 3455A 



Section I 



SECTION I 

GENERAL INFORMATION 



1-1. INTRODUCTION. 

1-2. This Operating and Service Manual contains informa- 
tion necessary to install, operate, test, adjust, and service 
the Hewlett-Packard Model 34SSA Digital Vdtmeter. 

1-3. Included with this manual is an Operating information 
supplement. The supplement is a duplication of the first 
three sections of this manual and should be kept with the 
instrument for use by the operator. 

1-4. This section of the manual contains the performance 
specifications and general operating characteristics of the 
34SSA. Also listed are available options and accessories, 
and instrument and manual identification information. 

1-5. SPECIFICATIONS. 

1-6. Operating specifications for the 34SSA are listed in 
Table 1-1. These specifications are the performance stan- 
dards or limits against which the instrument is tested. Table 
1-2 lists general operating characteristics of the instrument. 
These characteristics are not specifications but are typical 
operating characteristics included as additional information 
for the user. 

1-7. INSTRUMENT AND MANUAL IDENTIFICATION. 

1-8. Instrument identification by serial number is located 
on the rear panel. Hewlett-Packard uses a two-section serial 
number consisting of a four-digit prefix and a five-digit 
suffix separated by a letter designating the country in 
which the instrument was manufactured. (A = U.S.A.; 
G * West Germany; J = Japan; U = United Kingdom.) The 
prefix is the same for all identical instruments and changes 
only when a major instrument change is made. The suHlx, 
however, is assigned sequentially and is unique to each 
instrument. 



age measurements vrith five digit resolution and dc voltage 
and resistance measurements with S or 6 digit resolution as 
programmed by the user. The 3455 A employs an automatic 
calibration (AUTO CAL) feature which automatically cor- 
rects for possible gain and offset errors in the analog cir- 
cuitry to provide maximum accuracy. A removable refer- 
ence module permits external calibration of the dc voltage 
and resistance functions. The reference module can be 
removed, calibrated and returned to the instrument, or the 
module can be replaced with another recently calibrated 
reference. A MATH feature permits voltage or resistance 
measurements to be scaled into convenient units or to be- 
read directly in percent error from a selected reference. 
The 34S5A is HP-IB programmable for system applications. 

NOTE 

HP-IB is Hewlett-Packard's implementation of 
IEEE std 488-1975. “standard digital interface 
for programmable instrumentation ”. 

M3. OPTIONS. 

1-14. The following options are available for use with the 
Model 34S5A; 

Option 001 : Average Responding AC Converter 
Option 907; Front Handle Kit 
Option 908: Rack Mounting Kit 
Option 909: Front Handle and Rack Mounting Kit 
Option 910: Additional Set of Operating Information 
and Operating and Service Manuals 

1-15. Accessories Supplied. 

1-16. A service kit (-hp- Part No. 03455-8441 1) consisting 
of a PC extender board and a fuse is supplied with the 
Model 3455A. 

1-17. ACCESSORIES AVAILABLE. 



1-9. This manual applies to instruments with serial num- 
bers indicated on the title page, if changes have been made 
in the instrument since this manual was printed, a yellow 
“Manual Changes" supplement supplied with the manual 
vrill define these changes and explain how to adapt the 
manual to the newer instruments. In addition, backdating 
information contained in Section VII adapts the manual to 
instruments with serial numbers lower than those listed on 
the title page. 

1-10. Part numbers for the manual and the microfiche 
copy of the manual are also listed on the title page. 

1-11. DESCRIPTION. 

1-12. The Model 345SA Ehgital Voltmeter makes ac volt- 



1-18. The following is a list of accessories available for use 
with the Model 3455A. 



Accessory No. 



Description 



11177A 

341IIA 

10631A 

10631B 

10631C 

03455-61609 



34S5A Reference Module 
High Voltage Probe (40 kV dc) 
HP-IB Cable 1 meter (39.37 in.) 
HP-IB Cable 2 meter (78.74 in.) 
HP-IB Cable 4 meter (157.48 in.) 
Inguard/Outguard Service Cable 



1-19. Recommended Test Equipment. 

1-20. Equipment required to maintain the Model 3455A is 
listed in Table 1-3. Other equipment may be substituted if 
it meets the requirements listed in the table. 



1-1 




Section I 



Model 3455A 




Table 1-1. Specifications. 



DC Voltage 

Specificaiions apply with Auio-Cal ON 



Maalaeaai 
Raagaa: Diaplay: 

High High High High 

Resolution Resolution Resolution Resolution 

Off On Off On 



IV 





± 149999V 




IV 


IV 


•149999V 


±1499999V 


lOV 


lOV 


± 14.9999V 


•14 99999V 


1(K)V 


lOOV 


±149 999V 


± 149.9999V 


KXWV 


1(XX)V 


±1000.C)0V 


•lOOO.OOOV 



Raaga Selactioa: Manual. Automatic, or Remote 

Performance (High Resolution Off) 

Taaeparatar* Coafficlaat: (0*C to 50*0 

O.IV range ±(0.0003% of reading *■ 0.15 
diglisirC 

IV range: ±(0.0003% of reading + 0.015 
dlgUs)/“C 

lOV range: ±(0.00015% of reading -i- 0.01 
digits)/*C 

100 & lOOOV rartge: ±(0.0003% of reading .01 
digUs)/''C 

Accaracy: (1 digit » .0019* of range) : 

24 hours; 23°C ±rC 

lOV rartge: ±(0.002% of reading *■ 1 digil) 
IV range: ±(0.003% of reading + 1 digt) 
O.IV range: ±(0.004% of readirtg + 4 digits) 
100 & lOOOV range: ±(0.004% of reacfing + 1 di^} 
90 days; 23°C ±5-C 

lOV range. ±(0.005% of reading + 1 dlgitl 
IV range; ±(0.006% of readirtg + 1 digil) 
O.IV range: ±(0.007% of reading ■* 4 di^tsl 
100 & lOOOV range: ±(0.007% of reading * 1 digil) 
6 months; 23°C ±5’C 

lOV range: ±(0.008% of reading + 1 di^t) 
IV range: ±(0.009% of reading + 1 di^t) 
O.IV range: ±(0.010% of reading + 5 digits) 
100 & lOOOV range: ±(0 010% of reading + 1 digit) 

1 year; 23“C ±5'C 

lOV range ±(0.013% of reading * 1 digit} 
IV range. ±(0.014% of reading -f 1 digit) 
0 IV range: ±(0.015% of reading + 6 digits) 
100 & lOOOV range ±(0.015% of reading + 1 digit) 



Performance (High Resolution On) 

T«Mp«ratNr* (0°C to 50°C) 

IV range. ±(0.0003% of reading * 0.15 
digitsl/’C 

lOV range: ±(0.00015% of reading 0.1 
digtls)/X 

100.& lOOOV range: ±(0.0003% of reading 0.1 
digiis)/X 



Accaracy: (I digil « ,0 
24 hours; 23X ± IX 

lOV range: 
100 & lOOOV range; 
IV range 

90 days; 23X ±5X 

lOV rartge; 



.0019* of range) 



: (0.002% of reading ■* 3 digits) 
r (0.004% of reading -f 3 digits) 

: (0.003% of reading ■* 4 digits) 

luv rartge; ±{0.005% of readirtg * 3 digits) 
100 & lOOOV range: ±{0.007% of reading -t- 3 digits) 
IV range: ±(0.006% of reading ■* 4 digits) 
6 months; 2yc ±5X 

lOV range: ±(0.008% of reading -t- 3 di^ts) 
100 & lOOOV range ±(0.010% of reading •* 3 digits) 
IV range; ±(0.009% of reading -t- 5 digits) 

1 year 23X ±5X 

lOV range ±(0.013% of reading -f 3 digits) 
100 & lOOOV range: ±(0.015% of reading -f 3 di^te) 
IV range. ±(0.014% of readirtg 4- 6 digits) 

Input Characteristics 

■•pat Reaiatsacc: 

O.IV through lOV range: >10'" ohms 
lOOV and lOOOV range: 10 megohm ±0.1% 

(with AuiO-Cal OFF) 

M«siM«ai lapat Voftagc: 

High to Low Input Terminals: ±1000V pea)< 

Guard to Chassis: ± 500V peak 
Guard to Low Terminal: ±200V peak 
NorM«l Mode Rcjectloa (NMR): NMR is the ratio of the 
peak normal-mode voltage to the peak error voltage in 
the reading. 

50 Hz operation: > 60 dB at SO Hz ± 0.1 9o 
60 Hz operation: > 60 dB at 60 Hz ± 0.1% 

CoMMoa Mode Rajcctloa (ECMR): ECMR 
is the ratio of the peak common-mode voltage to the 
resultant peak error voltage in the reading with I k(l un- 
balance in low lead. 

AC Input: 

$0 Hz operation: > 160dB at 50 Hz ± 0.1% 

60 Hz operation: > 160 dB at 60 Hz ± 0.1% 

DC Input: 

> 140 dB 

MaslaaM Reediag Rale: 

f Hi Cata Laagtli 

HSgb Hlfb 

RaaelatSea ■••ofatloa 

Off Ob 

Local 5 readlngs/iec 3 readings/ sec 

■aaoic 24 readJngs/sec 6 readlngs/sec 

S«Hi Oaf Laapth 



Hl|h 

Raaofatloa 



High 

■••olatlea 



Local 

Besote 



3.5 readings/ sec 


2.5 readings/sec. 


22 readings/sec 


5 readings/sec. 



1-2 







Model 3455A 



Table 1-1. Specifications (Cont'd). 

Ohms 



Section I 



Masli 



Raa|ce: 




DUpiay: 




High 


High 


High 


High 


Resolution 


Resolution 


Resolution 


Resolution 


Off 


On 


Off 


On 


Ikn 




t49999kil 




Ikn 


Ikfl 


1.49999kfl 


1499999kfl 


10 kn 


lOkn 


14.9999kn 


14.9999%n 


lOOkfl 


lOOkn 


I49 999kO 


149.9999kn 


lOOOkfl 


lOOOkn 


1499.99kn 


1499.999kn 


looookn 


lOOOOkn 


14999 9kn 


14999 99kn 



Raag* S«l*ctlo«: Manual. Aulomatk;. or Remote 
FaBctio* S«l«ctloa: 2 wire k ohms or 4 wire k ohms 

Performance {High Resolution Off) 

Teaperalani Co«fficl«at: (OX to 50X1 

O.lkll range. (0.CX)03% of reading + 0.2 
digits)/X 

1. 10 and 10O<n range: (0.0003% of reading *■ 0.02 
dJglt$)/X 

lOOOkn range (0.0005% of reading + 0.02 
digit5)/X 

lO.OOOkn range. (0.004% of reading + 0.02 
digitsl/X 

AccMracy: 4 wire k ohms* (I digit = .(Ml ^ of range) 

24 hours; 23X ±1X 

O.lkn range: :^(0.003% of reading + 4 digits) 
Ikn range: ±(0.003% of readirtg + 1 di^) 
lOkn range: ±(0.005% of reading + 2 digits) 
lOOkn range: ±(0.002% of reading + 2 digits) 
llXIOkn range: ±(0.012% of reading *■ 5 digits) 
lO.OOOkll range: ±(0.1% of reading 5 digits) 

90 days; 23X ±5X 

O.lkO range ±(0005% of reading + 5 digits) 
Ikn range: ±(0.005% of reading -f 1 di^) 
lOkn range: ±(0007% of reading *■ 2 digts) 
lOOkn range: ±(0.004% of reading 2 digits) 
nXIOkll range: ±(0.014% of reading *■ 5 digits) 
10.IXXH<n range. ±(0.100% of reading + 5 digits) 
6 months; 23X ±5X 

O.lkn range: ±(0.005% of reading -f 6 digits) 
Ikn range. ±(0.005% of reading + 1 digH) 
lOkn range. ±(0.007% of reading + 2 digits) 
lOOkfl range ±(0.004% of readirtg *■ 3 digits) 
lOOOkn range: ±(0.014% of readirtg * 5 digits) 
lO.OOOkn range: ±(0.100% of reading -f 5 di^ts) 
1 year; 23X ±5X 

O.lkn range; ±(0.006% of reading + 7 digits) 
Ikfl range ±(0.006% of reading + 2 di^ts) 
lOkn rartge: ±(0.008% of reading + 3 digits) 
KMkfl rartge ±(0 0(%% of reading * 4 digits) 
lOOOkfl range ±(0.015% of reading 4 6 digits) 
lO.OOOkn range. ±(0 100% of reading 4 6 di^) 

Performance (High Resolution On) 

Taaparatar* CoafflctaBt: (OX to SOX) 

I. 10 and llX)kn range: ±(0.0003% of reading 4 0.2 

digiti)/X 

lOOOkn range: ±(0.0005% of reading 4 0.2 
diglt$)/X 

lO.OOOkn range: ±(0.004% of readirtg 4 0.2 
digils)/X 



Accaracy: 4 wire k ohms* (1 digit = .0001^ of range) 
24 hours; 23X ±1X 

Ikn range: ±(0.0025% of reading 4 4 digits) 
KHtfl rartge ±(0.0045% of reading 4 4 digits) 
lOCHtf) rartge. ±(0.0020% of reading 4 5 digits) 
lOOOkn rartge: ±(0.0120% of reading 4 4 di^ts) 
lO.OOOkn range: ±(0.1000% of reading 4 4 digits) 
90 days; 23X ±5X 

Ikn rartge: ±(0.0035% of reading 4 5 digits) 
lOkO range: ±(0.0060% of reading 4 5 digits) 
lOOkO rartge ±(0.0035% of reading 4 6 digits) 
lOOOkn rartge: ±(0.0135% of reading 4 5 digits) 
lO.OO^n rartge' ±(0.1000% of reading 4 5 digits) 
6 months. 23X ±5X 

Ikn range: ±(0.0040% of reading 4 6 digits) 
lOkn rartge: ±(0.(X)65% of reading 4 6 digits) 
lOOkn range: ±(0.0040% of reading 4 7 digits) 
lOOCMtO range: ±(0.0140% of reading 4 6 digits) 
lO.OOOkn rartge. ±(0.1000% of reading 4 6 digits) 
1 year; 23X ±5X 

Ikn range: ±(0.0045% of reading 4 7 digits) 
lOkn range ±(0.0070% of reading 4 7 digits) 
UXHtn range: ±(0.(X)45% of reading 4 8 digits) 
lOOMn rartge: ±(0.0145% of reading 4 7 digits) 
10.0(X)kn range: ±(0.1000% of reading 4 7 digits) 

*AccBracy: 2 wire k ohms 

All accuracy specifications are the same as 4 wire k ohms ex- 
cept add 0.0()04kn to all readings. 

Input Characteristics 

NaaiMBM vohage ••■crated acrocc 
■■kaowa: 

<5 volts for open circuit 
<4.7 vohs for valid reading 

So«rc« Drltrlag UakaowB (NomIbcI): 




Overload Protcciloa: 

Non-Destructive — ±350V peak 

MealMBM SeedlBg Rate: 

MHa Gale Leegtk 





ntk 


High 




■••olerioe 


■••eleliee 




Off 


Ob 


Lecel 


4 S readings/ lec. 


2 readings/sec. 


■•vole 


12 readings/ sec 


3 teadlngs/sec. 



5«Ha Gate Leeftk 





Htak 


High 




■evltlee 


■••olBiSee 




on 


Ob 


Local 


4 ieadings//sec. 


1.8 readings/sec. 


■a note 


11 readings/sec 


2.5 readings/sec. 







Section i 



Table 1-1. Specifications (Cont'd). 



AC Voltage (RMS converter) 



Model 3455A 






M«sIh«b 

DIaplay: 



High Resolution High Resolution 

On or Off On or Off 

IV 149999V 

lOV 14.9999V 

lOOV 149 999V 

lOOOV lOOO.OOV 

R««f« 8«i •ctioo: Manual. Automatic, or Remote 
Faactioa ACV or Fast ACV 

Performance 

Teoiperatprc Coafflclapt: (0°C to SOX) for inputs <50kHz 

AC coupled. Input >1% of full scale ±(0 002% of reading * 2 diglts)/°C 
AC coupled, input < 1% of full scale: ±(0 (X)2% of reading * 6 digft$)/°C 
AC/DC coupled. ±(0.002% of reading + 6 dlgits)/°C 
Accprocy: ±[ % of reading + digits or (% of rartgel ' (AC Coupling)’ 

FAST ACV* SSSHa-2SbH< SSkHs-ltSkHs lSSkHt-2SSkHt* 

ACV* 3SHi-2SkHt 2SkH>-lS«kHi lSSkHi-2SSkHi> 



2SSkHi-S0«kHi' 

25SkHt.SS»kHa* 



SSSkHt-lMHi* 

SSSkHilMHt* 



24 bra:2S-C ±TC 


.04% -f 40 dig 


0 4% * 80 (kg. 


1.8% * 200 dig 


4% -f 400 dig. 


5% 2600 dig. 




104%) 


(08%) 


1 (.20%) 


(.40%) 


(2.6%) 


90 dava: 2S C ±S°C 


05% SO dig 
(.05 V») 


0.5% * 100 dig 
(.10%) 


20% * 250 dig 
1.25%) 


5% * 300 dig 

(.50%) 


6% * 3100dig 

(3.1%) 



Cae*:2SX ±5*C 



1 v*ar;2S'C ±5°C 



06% 60 dig 

(06%) 

07% ♦ 70 dig 
(,07V») 



0.6% * 130 dig 

(.13%) 

0 7% * 160 dig 
(16%) 



2 1% > 300 dig 

(.30%) 

2 2% + 350 dig 
(35%) 



5.1% + 600 dig. 

(.60%) 

5.3% 700 dig 

(.70%) 



6.3% + 3S00dlg 

(3.5%) 

6.6% ♦ 3900dig 
(3.9%) 



MUSI be loMPoetf Su b* 

^MtbiabBiis aav sisty k* npiA kveb aaow t' > *«A«e 

r^M. eaupMMwb I % of hJ « kb ^ ?0 M kboa« «<WMC> lebb ewr«a 

S'.sfktfwbv kM l7n*^Bkb0w«4i«M>««<b * 

2 lue AC K <9U^if6 m#wik 



CsMl Factor: 7 : 1 al full scale 

Input Characteristics 

lapat iBpadaaca: 

Front Terminals— 2M0±1% shunted by less than l(X)pF 
Rear Termiisals — 2MH± 1% shunted by less than 75pF 

NaalwMB lapul Voltaga: 

High to Low Terminals: ± 1414 volts peak (Subject to a 
10^ voU • Hz limitation) 

Guard to Chassis: ±S00V peak 
Guard to Low Terminal ±200V peak 



AC tt mmT si naWip • TOtaniBkbohO ««ur«> isbk vwepr 

M AC DC atfut «b«e* bIbMr Mkd M ««b «M 1 4^ abMv ktfuiBv MNr 

ef lOObHt 4Sr kpeerbed O 9>e I V and IIW tan^n 

•Adt — r» m net ippcAad d <4m tw pBdvd aacaodi It)' 

-Sony ■«iii »««>»>. 



Navlaiaa Raadlag Rata: 

SiHi Oaf Laagth 

ACV I FAST ACV 

Local 1.3 readings/sec 4 5 readlngs/see 

1.3 readings/sec 13 readings/sec 



SSHa Gaf LaaftS 

ACV I FAST ACV 

1 1 readings/sec 3.5 readings/sec 

1 I readings/sec. 12 readings/sec 



Raapoaae Tiaa: 

ACV and FAST ACV 

First reading to <0.1% of step size when triggered coinci- 
dent with step change when on correct range. 

(for AC signals with no DC component) 



1-4 







Model 3455A 



Section 1 



Table 1-1. Specifications (Cont'd). 



AC Voltage (Average Converter Opt. 001 ) 



Raag**: 



Maalnaai 

Duplay: 



High Resolution 
On or Off 



High Resolution 
On or Off 



IV 

lOV 

lOOV 

lOOOV 



1.49999V 
14 9999V 
149.999V 
lOOO.OOV 



Ranga Salactloa: Manual. Automatic, or Remote 

Faactloa Salactloa: ACV ot Fast ACV 



Performance 

Taaiparatara Coafflciaat: (0°C to 50°C) 

±(0.002% of reading + 2 di$ts)/°C 

Accaracy: ±[% of reading + digits or (% of range)]' 



FAST ACV* 
ACVJ 


SMHa-SMtb 

SPHs-SPHa 


SPPHa-lkHa 

SPHa-lPtHa 


IkMs-lPPkHa 

IPPHs-lPPklU 


lPPkHs-25PkHa* 

lPPkHi-2SPkHa* 


24 hr»: 22*C :1*C 


0 47% + 70 dig 
(.07%) 


032% 50 dig 
(.05%) 


0.09% ♦ 25 dig 
(025%) 


0.70% 60 dig 
(.06%) 


9«days:2S°C :S°C 


O.S0% ■* 70 dig. 
(.07%) 


0.35% 50 dig. 
(.05%) 


0.1% + 25<kg. 

(.025%) 


0.75% + 60 dig. 
(.06%) 


C aoe: 22°C ±5X 


0.50% -f 70 dig 
(.07%) 


0.40% 60 dig. 

(.06%) 


0-1% ♦ 30 dig 
(03%) 


0.75% + 70 dig. 
(.07%) 


1 yt.i 2S°C ±S‘C 


0.50% + 70 dig. 
(.07%) 


0 40% + 70 dig. 
(.07%) 


0.12% -i- 35 dig. 

(.035%) 


0.75% + 80 dig. 
(.08%) 



’Caart PHa retpurud M 
Ob IOOOV ^4 01 9^ ydr • kH< 

' Fsigapmias. yaaPM i*un lOQbHa an I and KM s g Afw 

MesfKv R n Ri . d>«d d ^ *«fV ^ndwri 14 



Input Characteristics 



lapat iHpadaaca: 

Front Terminals— 2Mfl±l% shunted by less than lOOpF 
Rear Terminals — 2MO±l% shunted by less than 75pF 

Maalaaa lapat Voltaga: 

High to Low Terminals: ± 1414 volts peak (Subject to a 
10^ volt • Hz limitation) 

Guard to Chassis ±500V peak 
Guard to Low Terminal ±200V peak 

Mulaaai Raadlag Rato: 



MHt Gate Laagih SPHa Gate LeagSb 



ACV 


FAST ACV 


ACV 


FAST ACV 


13 teadir:gs/scc. 


4.5 readtngs/sec 


1 1 r«adings/sec. 


3.5 leadings/sec 


1 3 readings/ sec. 


13 readings/ sec 


M readings/sec 


12 readIngs/sec 



Reapoaea Tiaaa: 

ACV and FAST ACV 

First reading to <0.1% of step size when triggered coinci- 
dent with step change when on correct range 
(lor AC signals with no DC component) 



J-5 







Section I 



Model 3455A 



Table 1>1. Specificationi (Cont'dl. 



Math 


Sd«: 


% Error: x 100% 


X Is present reading Y and Z are previously entered read- 
ings. numbers entered from Ihe troni panel or valuesentered 
by external program. 

NMBb«ri (Entered or Displayed) 

±199.999 9 

Accaracyi 

± (ACCURACY OF X READING ±1 DIGIT OF DIS- 
PLAYED ANSWER)' 

■This assumes no "Y” or "Z" error. 


X is present reading. Y Is a previously entered reading, or 
number entered from the front pane) or by external program 

MaalHMM Noabor: (Entered or Displayed) 

±199.999 9 

Acctarscyt 

♦(ACCURACY OF X READING ± 1 DIGIT OF DIS- 
PLAYED ANSWER)' 

■This assumes no "Y” error. 


Table 1-2, Typical Operating Characteristics. 



Range SMactton: Manuel, Auiomalic.or Ramota 

Function Salaetlon; 

DC Volti 

AC Voltl (ACV or FAST ACVJ 
OHMS <2 wira kllohm or 4 wire kilohm) 

TEST 



NORMAL MODE REJECTION (50 Ht ORERATION) 




NORMAL MODE REJECTION (60 HI OPERATION) 




Efiective NoIk Bandwidlli * jj 

T ■ 1 /60 Mc loi 5 digit 60 Hz Operation 
T - 2/1S lecloi 6 digit 60 Hz Operation 
T * t/SO aec for 5 digit 50 Hz Operation 
T - 4/25 ICC for 6 digit SO Hz Operation 
COMMON MODE REJECTION (I KILOHM IMBALANCE) 




EFFECTIVE COMMON MOOE REJECTION (50 Hz OPERATION) 




1-6 




Model 34SSA 



Section I 



Table 1-2. Typical Operating Characteristics (Cont'd). 



EFFECTIVE COMMON MODE REJECTION (60 Hz OPERATION) 




Typical HF-IB Hsndihake Timei: 

Accepi Data — I3455A addressed to listen or ATN true) 
500 psec per character typical 19 delay tourcel 

Output Data - (3455A addressed to talk) 

250 Atec per character typical 10 delay acceptor) 



Gefieral (Auto Cal must be on for 75 seconds to meet all 
specifications) 

Overload Irtdication: OL ^ ^ 

Operstiny Temperature: OCtoSOC 
Warmup Time: One hour to meet all specifications 
Humidity Range: < 95% R^H., 0 C t§ 40 C 
Storage Temperature; —40 Ciot 75 C 
Power; 100/120/240 V +5%, -10% 48 Hz to 400 Hz line 
operation < 60 VA 

220 V 1 10% 48 Hz to 400 Hz line operation 
<60 VA 

Dimensions: 88.9 mm high x 425.5 mm wide x 527,1 
mm deep high x 16%" wide x 20%" deep) 
Weights: Net -9 kg (21 lbs.) 

Shipping - 12 kg (26 tbs.) 



1-21. SAFETY CONSIDERATIONS. 

1-22. The 34SSA is a safety class I instrument (provided 
with a protective earth terminal). The instrument and man- 
ual should be reviewed for safety symbols and instructions 
before operation. 



1-7 





Section 1 



Model 3455A 



Table 1-3. Recommended Test Equipment. 



Instrument 


Critical Specification 


Recommended Model 


Use 


DC Voltage Standard 


Voltaga: 10 mV to 1000 V 
Accuracy: i .005% 


Syetron Donner 
Model Ml 07 


PAT 


AC Calibrator 


Frequency: 30 Hz to 100 kHz 
Output Level: 100 mV to 1000 V 
Accuracy: i .1 % 

Voltage Stability <6 moi.) t .02% 


-hp- Model 745A 
AC Calibrator 
hp- Model 746A 
High Voltage Amplifier 


PAT 


Test Oscillator 


Frequency: 10 250 kHz 
Output: 3 V rms into 50 n 
Frequency Response t .25% 


-hp- Model 6S2A 
Test Oscillator 


P 


Resistance Decade 


Resistance: 100 n to 10 MD 
Accuracy: t .004% 


Gen Rad Model i 
GR 1433-Z Decade 
Resistor 


PAT 


DC Null Voltmeter 


Voltage Range. 1 siV to 10 V 


-hp- Modal 419A 


PAT 


Reference Divider 


Division Ratio Accuracy t .001% 
Output Voltage Range - 1 V 10 1 kV 


Fluke Model 750A 
Refereitce Divider 


PA 


DC Transfer Standard 


Output Voltages: 1 V, 1 .018 V. 

1.019V. 10 V 
Accuracy: t 5 ppm 
Stability: t .001% <30 daysl 


Fluke Model 731A 
DC Transfer Starrdard 


PA 


Electronic Counter 


50 Hz to 60 Hz 


-hp- Model S300A/S302A 
Measuring System 


P 


ResKtance Standard 


Resistance: 1 kfl 
Accuracy : ± .0005% 
Resistance: 100 K 
Accuracy: ± .002% 


Guildine Model 
9330/1 K or 9330A/1 K 
Guildline Model 9330/100 f 


A 


Bus System Analyzer 


HP-IB Control Capability 


-hp- Model 59401 A 
Bus System Analyzer 


T 


Calculator 


HP-IB Control Capability must 
serve as printer for 3455A 
Output data. 


-hp- Model 9825A 


OT 


Oscilloscope 


Bandwidth: DC to 10 MHz 
Sweep Time: 0.1 ps to 1 sec/div 
Sensitivity: 1 V/div 


-hp- Model 180C/D 
Oscilloscope with 
IBOIAand 1821A 
plug-in units 


T 


Digital Voltnteier 


Voltage Range; 10 mV to 1000 V 
Resolution: lOpV 


-hp. Model 3490A 


PAT 


Raiisiori 


Resistances: 

1 kn * 10 % 
10 kn 1 0.1% 
1 Mn to.1% 


-hp. Part No. 
0684-1021 
0698-4157 
0698-6369 


P 


Signature Artalyzer 




-hp- Model S004A 


T 



P ■ Performance Checks T ■ Troubleshootirtg 

A - Adjustmems 0 » Operetors Check 



1-8 





Model 3455A 



Section II 



SECTION II 
INSTALLATION 



2-1. INTRODUCTION. 

2-2. This section contains information and instructions 
necessary to install and interface the Model 34S5A Digital 
Voltmeter. Also included are initial inspection procedures, 
power and grounding requirements, environmental informa- 
tion, and repackaging instructions. 

2-3. INITIAL INSPECTION. 

24. This instrument was carefully inspected both mechan- 
ically and electrically before shipment. It should be free of 
mars and scratches and in perfect electrical order. The 
instrument should be inspected upon receipt for damage 
that might have occurred in transit. If the shipping con- 
tainer or cushioning material is damaged, it should be kept 
until the contents of the shipment have been checked for 
completeness and the instrument has been mechanically 
anJ electrically checked. Procedures for testing electric^ 
performance of the 3455A are given in Section IV. If the 
contents are incomplete, if there is mechanical damage or 
defect, or if the multimeter does not pass the Performance 
Tests, notify the nearest Hewlett-Packard Office. (A list of 
the -hp- Sales and Service Offices is presented at the back of 
the manual.) If the shipping container is damaged, or the 
cushioning material shows signs of stress, notify the carrier 
as well as the Hewlett-Packard Office. Save the shipping 
materials for the carrier's inspection. 

2-5. PREPARATION FOR USE. 

2-6. Power Requirements. 




*em teOVMH 



NOMINAL 

VOLTAGE 


OPERATING RANGE 
- 10%, + 6% of nominal 


FUSE 


100 volts 


90 to 105 volts 


0.5 A 


120 volts 


10B to 126 volts 


0.5 A 


220 volts 


198 to 231 volts 


0.25 A 


240 volts 


216 to 252 volts 


0.25 A 



Figure 2-1. Line Voltage Selection. 

used for -hp- power cables. The -hp- part number directly 
below each drawing is the part number for a power cable 
equipped with a connector of that configuration. If the 
appropriate power cable is not included with the instru- 
ment, notify the nearest -hp- Sales and Service Office and 
the proper cable will be provided. 

2-12. Grounding Requirements. 

2-13. To protect operating personnel, the National Electri- 
cal Manufacturer’s Association (NHMA) recommends that 
the instrument panel and cabinet be grounded. The Model 
34SSA is equipped with a three conductor power cable 
which, when plugged into an appropriate receptacle, 
grounds the instrument. 



2-7. The Model 34SSA requires a power source of 100. 
120. 220, or 240 V ac (+ S% - 10%). 48 I Iz to 400 Hz single 
phase. Maximum power consumption is 60 VA. 

2-6. Line Voltage Selection. 

2-9. Before connecting ac power to the 34S5A, make sure 
the rear panel line selector switches are set to correspond to 
the voltage of the available power line as shown in Figure 
2-1. Also, be sure the proper fuse is installed. The multi- 
meter is shipped with the line voltage and fuse selected for 
120 V ac operation. 

FCAUTION; 

Be sure ihe SO - 60 Hz rear panel switch is set 
for the proper line frequency for your location. 

2-10. Power Cable. 

2-11. Figure 2-2 illustrates the standard configurations 



2-14. Bench Use. 



2-1 5. The Model 34SS A is shipped with plastic feet and tilt 
stands installed and is ready for use as a bench instrument. 
The plastic feet are shaped to permit “stacking” with other 




2-1 






Section II 



Model 345SA 



full-module Hewlett-Packard instruments. The till stands 
permit the operator to elevate the front panel for operating 
and viewing convenience. 

2-16. Rack Mounting. 

2-17. The Model 34SSA may be rack mounted by adding 
rack mounting kit Option 908 or Option 909. Option 908 
contains the basic hardware and instructions for rack 
mounting; Option 909 adds front handles to the basic rack 
mount kit. The rack mount kits are designed to permit 
the Multimeter to be installed in a standard 19 inch rack. 
When rack mounting, additional support must be provided 
at the rear of the instrument. Be sure that the air intake at 
the rear of the instrument is unobstructed. 

2-18. Interface Connections. 

2-19. The Model 34S5A is compatible with the Hewlett- 
Packard Interface Bus(HP-IB). 

NOTE 

HP-IB is Hewlett-Packard's implementation of 
IEEE std 488-1975, "Standard Digital Interface 
for Programmable Instrumentation 

The Multimeter is connected to the HP-IB by connecting an 
HP-IB interface cable to the 24-pin connector located on 
the rear panel. Figure 2-3 illustrates typical HP-IB system 
interconnections and shows the 10631A/B/C HP-IB Inter- 
face Cable connectors. Each end of the cable has both a 
male and female connector to simplify interconnection of 
instruments and cables. As many as IS instruments can be 
connected by the same interface bus: however, the maxi- 
mum length of cable that can be used to connect a group of 



instruments must not exceed 2 meters (6.S ft.) times the 
number of instruments to be connected, or 20 meters 
(65.6 ft.), whichever is less. 

2-20. Address Selection. The HP-IB address switch, 
located on the rear panel, permits the user to set the “talk” 
and “listen” address of the instrument. The talk and listen 
address is a 7-bit code which is selected to provide a unique 
address for each bus instrument. The 345SA normally 
leaves the factory with the address switch set to a “Listen” 
address of 6 and a “talk” address of V. The address switch 
also allows selection of a “talk-only” mode. Refer to 
Paragraph 342 for address selection instructions. 

2-21. External Trigger. A BNC connector, located on the 
rear panel, is provided for an external trigger input. The 
trigger input is to be driven with TTL level signals. 

2-22. ENVIRONMENTAL REQUIREMENTS. 



WARNING 



To prevent electrical shock or fire hazard, do 
not expose the instrument to rain or moisture. 

2-23. Operating and Storage Temperature. 

2-24. In order to meet the specifications listed in Table 

1- l, the instrument should be operated within an ambient 
temperature range of 23'"C t S^C (73“F ± 9“F). The instru- 
ment may be operated within an ambient temperature 
range of 6°C to + 55®C (+ 32°F to + 131°F) with degraded 
accuracy. 

2- 25. The instrument may be stored or shipped where the 
ambient temperature range is within — 40^C to *7S°C 
(_40®F to +167'*F). However, the instrument should not 




Figure 2-3. Typical HP-IB System Interconnections. 



2-2 







Model 34SSA 



Section H 



be stored or shipped where temperature fluctuations cause 
condensation within the instrument. 

2-26. Humidity. 

2-27. The instrument may be operated in environments 
with relative humidity of up to 95%. However, (he instru- 
ment must be protected from temperature extremes which 
cause condensation within the instrument. 

2-28. Altitude. 

2-29. The instrument may be operated at altitudes up to 
4572 meters (15,000 feet). 

2-30. REPACKAGING FOR SHIPMENT. 

NOTE 

// the instrument is to be shipped to Hewlett- 
Packard for service or repair, attach a tag to the 
instrument identifying the owner and Micating 
the service or repair to be accomplished. 
Include the model number and full serial num- 
ber of the instrument. In any correspondence, 



identify the instrument by model number and 
full serial number. If you have any questions, 
contact your nearest -hp- Sales and Service 
Office. 

2-31. The following is a general guide for repackaging the 
instrument for shipment. If the original container is avail- 
able. place the instrument in (he container with appropriate 
packing material and seal well with strong tape or metal 
bands, if the original container is not available, proceed as 
follows: 

a. Wrap instrument in heavy paper or plastic before 
placing in an inner container. 

b. Place packing material around all sides of instrument 
and protect panel face with cardboard strips or plastic 
foam. 

c. Place instrument and inner container in a heavy 
carton and seal with strong tape or metal bands. 

d. Mark shipping container “DELICATK INSTRU- 
MENT”, “FRAGILE", etc. 



2-3 




© © © © 



Section III 



Model 3455A 




FRONT PANEL 
Line Switch, push on/push oM 
HP-lS* status indicators: 

SRQ - indicates that the 3455A "requires service" from 
the controller. Refer to Paragraph 3-78. 

LISTEN — lights when the 3455A is addressed to 
"listen". 

TALK — lights when the 3455A is addressed to "talk". 
REMOTE — lights when the 346BA is under HP-18 
control. 

LOCAL switch — permits the operator to return the 
instrument to local (front panel) control. 

Display - Indicates polarity and amplitude of the 
measurement. Measurement results are presented in either 
S-l/2 digits or 6-1/2 digits depending upon whether the 
HIGH RESOLUTION feature is off or on. An LED in the 
upper left corner of the display indicates sample rate of 
the 3455A. Five LED’s, located to the right of the dis- 
play, Indicate whether the display it presenting DC Volt- 
age, AC Voltage. Ohms. Scale or % error measurement 
results. 

Range Selection Keys - permit selection of ranges as 
follows: 

DC Volts: .1 V. 1 V, 10 V. 100 V. 1 kV. AUTO 

AC Volts. 1 V. 10 V, 100 V. 1 kV. AUTO 

Ohms: .1 K. 1 K. 10 K. 100 K. 1.000 K. 10.000 K. AUTO 

LED's located in the center of the keys indicate which 

range is selected. 

Function Selection Keys - DC Volts, AC Volts. FAST 
AC Volts. 2 WIRE kn. 4 WIRE kD. and TEST. LED's 
located in the center of the keys indicate which function 
it selected. 

Auto Cal switch - allows the Auto-Cal feature to be turn- 
ed on or off. LEO in center of Key indicates Auto-Cal on. 
Refer to Paragraph 3-29. 



Data Ready Request Indicator - lights when the Data 
Ready Request feature is programmed on. Refer to 
Paragraph 3-65. 

High Resolution switch — switches display from 5-1/2 
digit presentation to 6-1/2 digit presentation. An LED 
located in the center of the key indicates High Resoiu- 
tion on when lit. 

Trigger Selection Keys - permits selection of INTER- 
NAL. EXTERNAL, or HOLD/MANUAL trigger. Each 
key has an LED which lights to indicate the trigger source 
selected. 

Sample Rate Controls — permit selection of maximum 
sample rate or the present sample rate divided by 2. The 
maximum sample rate may be divided by 2 up to 6 times 
for a minimum sample rate of: maximum sample rate 



Binary Program Indicator - indicates whan the 3455A is 
operating in the Binary Program mode. Refer to 
Paragraph 3-66. 

Math Controls - Select SCALE ~ . % ERROR 

X-Y '' 

( X 100), or MATH OFF. The Math feature selected 
Y 

ia indicated by an LED located in the key (Paragraph 
3-191. 

ENTER controls ■ Recall the number stored in the Y or Z 
register to the display, alao "ahifta" the from panel 
keyboard to permit entry of new data to be stored in the 
Y or Z registers (Paragraph 3-231. 

STORE Controls - The Store controls transfer the 
number presently being displayed into the Y or Z register 
(Paragraph 3-23). 

Rear Terminal Irxiicator • indicates when the rear input 
tarminala have been selected. 



Figure 3-1. Front and Rear Panel Features. 



3-0 









Model 3455A 



Section III 



SECTION III 

OPERATING INSTRUCTIONS 



3-1. INTROOUCTION. 

3-2. This section contains information and instructions 
necessary for operation of the Model 345SA Digital 
Voltmeter. Included is a description of operation 
characteristics, a description of the operating controls 
and indicators, and functional checks to be performed 
by the operator. 

3-3. OPERATING CHARACTERISTICS. 

3-4. Tara Oi) and Wana-Up. 

3-5. Before connecting ac power to the 34S5A. make 
certain the rear panel line selector switches are set to 
correspond to the voltage and frequency of the available 
power line and that the proper fuse is installed for the 
voltage selected. For rated measurement accuracy, the 
345SA should be allowed to warm up for at least one 
hour. 

3-B. Salt Tast Oparation. 



logic of the instrument. When all these measurements 
and calculations are completed, the 34S5A will display 
+ . 8 . 8 . 8 . 8 . 8 . 8 . 8 . and the self-test operation will start 
again. In order to bring the instrument out of this mode, 
any other function button must be pressed. 

3-8. In the event of a cal constant failure, the Self-Test 
operation will stop and the failing cal constant’s number 
will be displayed (an integer number from 13 to 0). If 
the dummy calculation fails, a non integer number is 
displayed (e.g., 9.998 or 10.002 etc.). 

3-9. The Self-Test function can be remotely programm- 
ed, as described in the programming portion of this sec- 
tion. The 3455A will output a 10 upon a successful com- 
pletion of the test and if addressed to “talk.” If the 
dummy calculation fails, the answer of the dummy 
calculation will be the output (9.998 or 10.002 etc.). If 
any auto-cal constants fail, the 3455A will not output 
any readings, (times out). 

NOTE 



3-7. The internal test function of the 3455A verifies the The self test feature does not test operation 

operation of the dc analog circuitry, inguard and of the ohms or ac sections nor the measure- 

outguard logic circuitry, and the front panel indicators ment accuracy of the 34S5A. 

and display. The primary test of the dc analog circuitry 

is the measurement of various Auto-Cal constants. A 3-10. DC Veltiga MNSureawnL 
logic check is also performed, when all the cal constant 

measurements are taken. The logic check consists of a 3-11. The Model 3453A measures dc voltage from 1 

dummy cal constant calculation made in the outguard microvolt to KXX) volts in five ranges extending from .1 





Ohms Signal Terminals • supplies drive signal lor 




Line Frequency Selection Switch - must be set to corres- 


4*WIRE Ohms measurements (Paragraph 3-12). 




pond to the power liite frequency (SO Hz or 60 Hzl. 




Input Terminals 


@ 


Reference Module 


® 


GUARD switch - Internallv connects the Guard terminal 
to the LO Input terminal (for front partel operation only, 


@ 


EXTERNALTRIGGER Input Connector 




Paragraph 3-411. 


® 


HP-IB* Address Selection Switch • refer to Paragraph 


@ 


GUARD Terminal 


3-63. 


REAR PANEL 




Cooling Fan 


® 


Ohms Signal Terminelt 


® 


Power Line Voltage Selection Switches — refer to Para- 
graph 2-8. 


® 


Input Terminals 






(S) 


Fuse - 90 V to 126 V - 0.6 amp. 198 V to 262 V - 


® 


Guard Terminals 




0.2S amp. 




Front/Reat INPUT SELECT switch 


® 


AC Power Connector. 




HP-IB* Connector - see Paragraph 2-18 and 3-48. 




*HP-I0 IS Hewlett-Packard's implementation of IEEE Std. 


® 


AC or AC/OC Input Selection switch - refer to Paragraph 
3-14. 




488'197S. "Standard Digital Interface for Programmable 
Instrumentation ". 



Figure 3-1. Front and Rear Panel Features (Cont'dl. 



3-1 








Section III 



Model 3455A 




Figure 3*2. Ohmmeter Measurement Connections. 



volt full-scale to 1000 volts full-scale. Measurement 
results are presented in 5-1/2 digits during normal 
operation or in 6-1/2 digits when the 34S5A is set to the 
High Resolution mode. All ranges except the 1000 volt 
range have 50^ overrange capability and are overload 
protected from input voltages up to ± 1000 volts. Input 
resistance in the dc function is greater than 10'^ ohms 
on the .1 V, 1 V, and 10 V ranges and equal to 10 
megohms on the 100 V and 1000 V ranges. Refer to 
Table 1-1 for DC Accuracy specifications. 

3-12. Rnistancs Maasuramant. 

3-13. The Model 3455A measures resistance from 1 
milliohm to 15 megohms in six ranges extending from .1 
kilohms ful scale to 10.000 kilohms full scale. Measure- 
ment results are presented in 5-1/2 digits during normal 
operation or in ^1/2 digits when the 3455A is set to the 
High Resolution mode. The only exception is that the .1 
V range can only take a measurement in the 5-1/2 digit 
mode. Resistance may be measured in “4-WIRE” con- 
figuration for optimum accuracy or “2-WlRE” con- 
figuration may be selected for measurement conve- 
nience. Figure 3-2 shows proper connections for making 
resistance measurements. The nominal output signal 
current on the .1 kilohm, I kilohm and 100 kilohm 
ranges is .7 mA. The nominal output current on the 
1000 kilohm and 10,000 kilohm ranges is .7 microamp. 
Maximum output voltage is limited to less than 5 volts 
on all ranges. Refer to Table 1-1 for ohm accuracy 
specifications. 

3-14. AC Voltage Meaiuremont. 



volts RMS. Readings taken in the ac function are 
display in the 5-1/2 digit mode only. Input impedance 
of both convertors is 2 megohms in parallel with 
< 75 pF for rear terminal input and < 90 pF for front 
terminal input. In addition to the normal ac volts func- 
tion, the 3455A also has a fast ac volts function. The 
fast ac function has a faster ac reading rate than the nor- 
mal ac function. 

3-16. The frequency response of the true RMS conver- 
tor is from 30 Hz to 1 MHz in the normal ac volts func- 
tion and from 300 Hz to 1 MHz in the fast ac volts func- 
tion. Both ac signals or ac plus dc signals (ac signals 
superimposed on a dc level) can be measured by the true 
RMS convertor. Selection of the ac or ac -f dc inputs 
are chosen by a switch located behind the rear panels 
reference cover. Refer to Table 1-1 for accuracy 
specifications of each ac mode. 

3-17. The frequency response of the average converter 
is from 30 Hz to 250 Hz in the normal ac volts function 
and from 300 Hz to 250 kHz in the fast ac volts func- 
tion. Only ac signals (no dc component) can be 
measured by the average converter. Refer to Table 1-1 
for accuracy specification of each ac mode. 

3-18. In order to get accurate ac readings (especially 
with high voltage inputs at high frequencies), the low in- 
put terminal (front and rear) should be connected to the 
guard terminal (front and rear). Refer to paragraph 3-39 
for guarding information. 



3-15. The -hp- Model 3455A offers a choise of true 

RMS (standard unit) or average responding ac conver- NOTE 

tors (Option (X)l). ^th methods measure ac voltages 

from 10 microvolts to 1000 volts in four ranges exten- The front pane! guard pushbutton applies 

ding from 1 volt to 1(XX) volts ranges. All ranges, except only for front panel inputs. Be sure to wire 

the 1000 volts range, have 50% overrange capability and rear panel guard connections yourself, if us- 

are protected from input voltage components up to 1000 ing the rear pane! input terminals. 



3-2 








Model 34SSA 



Section ill 



3-19. Math Featura. 

3-20. The math feature of th 3455A allows the measure- 
ment value to be offset and/or scaled by known values 
or to be expressed in percent of a reference value. 

3-21. Scala Mode. The scale mode of the math feature is 
described by the formula: result = where x is the 

y 

measurement value, z is the offset value, and y is the 
scale factor. This mode allows the measurement value to 
be modified by the addition, subtraction, multiplication 
or division of a known value. Addition and subtraction 
are performed by entering the number to be added or 
subtracted in "z” and entering I in “y”- The scale for- 
mula then becomes: result « x - (A z) s x - (± z). 

1 

Division is performed by entering 0 in *'z’’ and the 
divisor value in “y.” The scale formula then 
becomes: result = x - 0 = x. Multiplication is perform- 

y y 

performed by dividing the measurement value by the in- 
verse of the multiplier value; that is, multiplication is 
performed by dividing by a fraction. The scale formula 
becomes: result = . x - 0 = xy. As an example: to 
1/y 

multiply by 10, divide by the inverse of 10 which is 1/10 
or .1. Various examples using the scale mode are as 
follows: 

a. Current Measurement: Accurate current 
measurements can be made by using a low value resistor 
shunting the 34S5A’s input terminals. The value of the 
resistor is then entered in the “y” register (see 
Paragraph 3-22), and zero is entered in the "z” register 
With the resistor connected at the input terminal and the 
instrument set in the voltage mode, current 
measurements can now be made. You can do this by 
connecting the input across the resistor and measuring 
the voltage drop across the resistor. This voltage drop is 
proportional to the current through the resistor. By 
switching the 34SSA to the scale mode, the reading 
becomes an accurate current reading in milliamps. Since 
the resistor value is in kilo ohms (R) and stored in *‘y”. 
and since zero is stored in *‘z", the scale equation 
becomes: 

x-y _ current in milliamps 

y R R 

where R = Resistor across the input terminals 
V = Voltage drop across the resistor 

b. Temperature Measurement: A temperature mea- 
surement can be made by using a line or resistive 
temperature sensor. 

Assume that the sensor has a resistance of I kilohm at 
25“C and changes 5900 ppm/*C. At 0®C the sensor 
would have a resistance of 852. S ohm (1 kilohm - [5.9 
ohms] 25). This number is divided by 1000 since the 



34S5A measurement results are expressed in kilohm and 
is entered in the “z” register to remove the offset at 
0”C. The measurement result of (he 34S5A is scaled to 
read directly in degrees centigrade by solving the equa- 
tion for the value of “y”. This is done where the results 
of the equation are equal to 25” C since the sensor 
resistance is specified at that temperature. The scale 
equation becomes: 

25 = 1 K-.8525 K , .1475 K 

y y y 

solving for y:y = ^ = .0059 with this number 

25 

entered in the “y” register, the 3455A measurement 
result will be presented directly in ”C. 

c. Accurate 2 Wire Ohm Measurement: When trying 
to make an accurate 2 wire ohm measurement, the input 
lead resistance and the internal resistance of the 3455A 
should be subtracted out from the reading. This is done 
by setting the instrument to the desired range and short 
the input leads at the measuring point. Store a 1 in "y" 
and store the input lead resistance reading in "z”. Open 
the input leads and connect the unknown resistor to the 
leads. With the 3455A set in the Scale mode, the value 
of the unknown resistor is displayed without the input 
lead resistance. Since a 1 is stored in "y" and the lead 
resistance (R) is stored in “z”, the scale equation 
becomes: 

^~y = = unknown resistance in ohms 

Y 1 

where x = total measured resistance including R 
R = lead resistance 



3-22. Error Mode. The error mode of the math 
feature is described by the formula: result in g x-y x 

y 

100, where “x” is the present measurement value and 
“y” is the reference value. An application of this 
feature might be an inspection test of resist rs. This 
nominal resistor value would be entered in the “y” 
register in kilohm (3455A) resistance measurements are 
presented in kilohm). As an example, assume the test is 
made on a group of 750 ohm resistors with a tolerance 
of 5^9 . The nominal resistor value (750 ohms) is entered 
in the “y” register as .750. The error equation 
becomes: result in •?# = X-.750 x 100. A resistor with 

-m 

an actual value of 790 ohms would give a measurement 
result of: error = .790-750 x 100 * 5. 333331^0, 

750 

indicating the resistor is out of tolerance by .33333*7o. 

d. Limit Testing: The Scale mode of the 3455A can 
also be used to do Limit Testing. This can be ac- 
complished since the largest number which can be 



3-3 




Seclion (II 



Model 345SA 



displayed is + 200,000 and the smallest number is 
-200.00. If the magnitude of the display exceeds 
200,000, either a “ + LL” or a **-LL” is displayed. 
Therefore, the “y” and “z” constants must be chosen 
so that when “x" (the reading) is equal to the upper 
limit, the display is + 200,000 and when “x" is equal to 
the lower limit, the display is -200,000. This can be ac- 
complished as follows; 

When X = the Lower Limit, the DISPLAY should = 

• 200,000 

When X = the Upper Limit, the DISPLAY should » 

+ 200,000 

therefore, -200,000 = Lower Limit • z 

y 

and + 200,000 = Upper Limit - z 

y 

This leaves two equations to solve for the unknown ”y” 
and "z” constants. The two constants can be found the 
following way: 



3-23. Enter end Store. 

3-24. The "Y” and “Z” ENTER keys have two func- 
tions. When one of the enter keys is pressed, the number 
presently stored in the respective memory register is 
displayed on the front panel readout. This allows the 
operator to check the contents of the “Y” or “Z” 
memory registers. Pressing the enter key also “shifts” 
the front panel keyboard, disabling all keys except those 
labeled in blue. These keys can now be used to enter the 
desired values to be stored in the "Y” or “Z” memory 
registers. As the value is entered it is displayed on the 
from panel readout. Numerical values from .OOOCXX) to 
+ or - 199,999.9 may be entered in either the Y or Z 
registers. 

3-25. The STORE keys are used to transfer the number 
presently being displayed in the “Y” or “Z” memory 
registers and to return the voltmeter to normal opera- 
tion. 

3-26. The following describes how the ENTER and 
STORE features may be used: 



-200,(XX) (y) 
+ 200,000 (y) 
0 

therefore, z 
200,000 



Lower Limit - z 
Upper Limit • z 

Lower Limit + Upper Limit -2Z 
(add these two equations) 

Upper Limit + Lower Limit 
2 

Upper Limit • z 

y 



200,000 (y) = 

Upper Limit- UPP«r Limit + Lower Limit 

2 



Upper Limit • Lower Limit 
2 



and, y 



Upper Limit - Lower Limit 

400,000 



The following is an example of how to use this math 
technique. In this example a DC voltage is measured 
and compared with a Lower Limit of 10 volts and an 
Upper Limit of 30 volts: 

y B Upper Limit - Lower _ 30-10 _ qqq ()5 

400,000 400,000 

, _ Upper Limit + Lower Limit _ 30 + 10 b 20 
2 2 



By entering .00005 into the “y” register and 20 into the 
“z” register, and then pushing the SCALE and DCV 
buttons, the 3455A becomes a limit testing DVM. If the 
input exceeds 30 volts a “ + LL” is displayed, and if the 
input is less than 10 volts a “-LL” is displayed. If the in- 
put is within the limits set. a number is displayed. 



a. To view the value presently in memory, press the 
ENTER key of the appropriate register (ENTER Y or 
ENTER Z). To return this number to memory, press the 
STORE key of the appropriate register. 

b. To enter a new number, press the ENTER key of 
the register to receive the number. Enter the desired 
number into the display by pressing the keys labeled in 
blue. Store the number entered by pressing the STORE 
key of the appropriate register. 

c. To enter a measurement value presently being 
displayed, press the STORE key of the desired register 
(Y or Z). 

NOTE 

The operation of the ENTER and STORE 
keys are not mutually exclusive. That is, the 
number being displayed may be stored in 
either the Y or Z register independently of 
the register selected by the ENTER keys. 

3-27. High Resolution Mode. 

3-28. When the 3455A is used in the HIGH RESOLU- 
TION mode, the instrument changes from a 5-1/2 digit 
measurement to a 6-1/2 digit measurement. This 
changes the measurement resolution from 10 parts/1.5 
million (5-1/2 digit mode) to 1 part/1.5 million (6-1/2 
digit mode). The integration period will also change 
from 1/60 second (1/50 second for 50 Hz operation) to 
8/60 second (8/50 second for 50 Hz operation). The 
High Resolution mode cannot be used in the AC mode 
or the .1 V DC and 1 K ohm ranges. The reading rate in 
the DC and Ohms mode will also increase when the 
High Resolution function is turned off. Table 3-1 gives 
the various reading rates of the DC and Ohms functions 



34 




Model 345SA 



Section Ml 



with High Resolution turned on or off. 

3-29. Aato-Cil. 

3-30 The purpose of the AUTO-CAL feature is to 
eliminate offsets, gain non-linearity, and drift which 
maybe present in the analog measuring circuits of the 
34SSA. This is accomplished by measuring the offset 
and gain errors and then mathematically correcting the 
measurement reading to exclude them. Each of the gain 
and error measurements, called Auto-Cal constants, are 
stored in the “memory” by the 3455A’s main con- 
troller. These Auto-Cal constants are usually taken be- 
tween each sample of the instrument and are updated 
each time a new cal constant measurement is made. 

3-29. The reading rate of the 34SSA increases when the 
Auto-Cal feature is turned off. Table 3-1 gives the 
reading rate of the various functions with Auto-Cal on 
or off. 

3-32. The last set of constants are used to correct 
measurements, when the Auto-Cal mode is turned off. 
As long as the input amplifier offsets, gain linearity 
and drift do not vary the 34S5A should remain within 
it’s accuracy specifications. The time period over which 
these parameters will not change may vary from instru- 
ment to instrument. When the Auto-Cal function is 
disabled to obtain faster reading rates, it is recommend- 
ed to periodically return the 34SSA to the Auto-Cal 
mode in order to update the cal constants. This can be 
done after a block of readings have been taken or when 
the instrument is not in use. The instrument will then 
update the cal constants for accurate measurements. 
Allow about 6 seconds for updating the cal constants, if 
the 34SSA is in the Hold mode. 

3-33. Trigger. 

3-34. The 3455A has three trigger modes. INTERNAL, 
EXTERNAL, and HOLD/MANUAL. The following is 
an explanation of each trigger mode. 

a. Internal Trigger: This trigger is generated inter- 
nally and triggers the 34SSA to lake a reading, after the 
previous operation is completed (a reading or Auto-Cal 
measurement). This trigger mode is entered when the in- 
strument is turned on, when the Internal Trigger button 
is pressed, or a Device Clear message is remotely sent. 

b. External Trigger: When the 3455A is the External 
Trigger mode, the user can trigger the instrument from 
an external trigger pulse. This trigger pulse has to be ap- 
plied to the rear External Trigger Connector and should 
have a negative TTL edge and must be at least 3 seconds 
wide. The instrument will take a measurement, when 
this trigger pulse is received. After the measurement is 
taken, the 34SSA can be triggered again for a new 
reading. If the instrument is triggered while making a 
measurement, the new trigger is delayed. After the first 



measurement cycle is completed, the delayed trigger will 
iniate a second measurement cycle. Only one trigger will 
be delayed during any given measurement cycle. Any ex- 
tra triggers sent during this cycle will be ignored. 

c. Hold/Manual Trigger: This trigger is similar to 
the External Trigger, except it can be executed by the 
Hold/Manual button. The Hold/Manual button must 
be pressed once in order to place the 3455A in the Hold 
m<^e. After pressing the Hold/Manual button the se- 
cond time, a measurement is taken. When the measure- 
ment cycle is completed, the Hold/Manual button can 
be pressed again for a new reading. It is important to 
remember that the Hold/Manual button should be 
pushed twice in order to take the first reading. If trig- 
gered while a measurement is taken, the trigger is 
delayed until the measurement cycle is complete. The 
delayed trigger will initiate a second measurement cycle, 
when the first one is completed. Only one trigger will be 
delayed during any given measurement cycle. Any extra 
triggers sent during this cycle will be ignored. 

3-3S. Auto-Cal constants measurements also depend on 
the Trigger mode used. An input reading and a cal cons- 
tant measurement will alternately be taken, when the 
34SSA is in the Internal Trigger mode. A typical se- 
quence would be an input reading, one cal constant 
measurement, another input reading, the next cal cons- 
tant measurement, and so on. An attempt of this se- 
quence (input reading/cal Constant measurement) is 
^so made when the instrument is in the Hold/Manual 
or External Trigger modes. If, however, a trigger is 
received while a cal constant measurement is taken, this 
measurement is aborted and an input reading is taken. 
After this reading, the aborted cal constant measure- 
ment is then retaken. If a new trigger is received before 
the cal constant measurement is finished, the measure- 
ment is again aborted and a new input reading is taken. 
The cal constant measurement can be aborted a number 
of times, depending on the function of the instrument. 
The table below lists the number of times the cal cons- 
tant measurements can be aborted. After this number 
has been reached, the trigger will be delayed and the 
Auto-Cal constant measurement is then completed. 



Functiun 



Miximum Number of Cel 
Conetant Termination 



DC 126 

DC (High Resolutiont 32 

AC Fast 64 

AC Normal 8 

Ohms 64 

Ohms <H»gh Resolution) 1 6 



These numbers are accumlative when Auto-Cal is on. 



3-36. Sample Rate (Diaplay). 

3-37. The SAMPLE RATE of the 3455A is set internal- 
ly and depends on the function selected, the power line 



3-5 




Section 111 



Model 34SSA 



frequency, and use of the Auto-Cal and High Resolu- 
tion modes. When the Sample Rate buttons are pressed, 
the display rate of the reading are changed. By depress- 
ing the Decrease 2 button on the front panel, the 
display rate can be decreased. Each time this button is 
pressed, the display rate is divided by two. The rate may 
be divided a maximum of six times for a display rate of 
1/64 of the maximum rate. The 3455A can be reset to 
the maximum rate by depressing the maximum button, 
after the display rate has been decreased. Table 3-1 gives 
the maximum number of readings the instrument can 
display on the front panel, in local operation. 



Table 3-1. Maximum Front Panel Reading Rates. 



Func 

Function 


High 

Resolution 


Auto 

Calibration 


Maximum Sample Rate 
Maximum Sample Rate 


DC Volts 


ON 


ON 


3 readings/sec (60 Kzl 
2.5 readings/sec (SO Hz) 




OFF 


ON 


5 readings/sec (60 Hzl 
3.5 readings/sac 150 Hz) 




ON 


OFF 


6 readings/sec 160 Hz) 
5 readings/sec ISO Hz) 




OFF 


OFF 


24 readings/sec (60 Hz) 
22 readings/aec (50 Hz) 


Ohms 


ON 


ON 


2 readir>gs/sec 160 Hz) 
1.8 reading/sec (50 Hzl 




OFF 


ON 


45 readings/sec (60 Hz) 
4 readings/sec 150 Hzl 




ON 


OFF 


3 readings/sec (60 Hz) 
2.5 readings/sec ISO Hzl 




OFF 


OFF 


12 readings/sec (60 Hz) 
1 1 readings/sec 150 Hz) 


AC Volts 


Not 

Applicable 


ON 


1.3 readings/sec (60 Hz) 
1.1 readings/sec (50 Hz) 




Not 

Applicable 


OFF 


1.3 readings/sec (60 Hz) 
1.1 readirtgs/sec (50 Hz) 


Fast 

AC Volts 


Not 

Applicable 


ON 


4.5 readings/sec 160 Hzl 

3.5 readings/sec ISO Hz) 




Not 

Applicable 


OFF 


13 readings/sec (60 Hz) 
12 readings/sec (50 Hz) | 



3 3B. Auto Range. 



3-39. The AUTO RANGE feature of the 3455A can be 
used to automatically uprange and downrange the in- 
strument to the optimum range. This action takes place 
when an input measurement is taken. Upranging is dene 
when the reading is ISO^e of full scale and downranging 
at 14^0 of full scale. The Auto Range operation can be 
observed by applying 1 .4 volts to the input of the 
34SSA. The range selected by the instrument is the I V 
range. When the input voltage exceeds 1.5 volts, the 
345SA upranges to the 10 V range. When the input 
voltage is decreased below 1.4 volts, the 1 V range is 
again selected. The uprange points, the downrange 
points, and the accuracy of the instrument should be 
kept in mind when making a measurement. Time- 



varient inputs may cause the 345SA to constantly 
uprange and downrange. If this happens, manually set 
the instrument to the higher range. 

3-40. Measurement time may also change, when the in- 
strument is in the Auto Range mode. If the instrument is 
not on the optimum range, a reading is taken and the 
34S5A will either uprange or downrange. Another 
reading is then taken and if the optimum range has been 
found the reading will be displayed. If not, the instru- 
ment continues to uprange or downrange. A reading is 
taken on all intermediate non-optimum ranges until the 
correct range is found. The measurement time on each 
range should be added to the total measurement time. 

3-41. GUARDING. 

3-42. Common-Modi Voltagoo. 

3-43. Common-mode voltages are those which are 
generated between the power line ground point of the 
source and the LO input and power line ground point of 
the 3455A. Currents caused by common-mode voltage 
can be included in the measurement circuit, causing 
measurement errors. 

3-44. Guard CennKtion. 

3-45. Figure 3-3 illustrates three methods of connecting 
the 34SSA Guard terminal to reduce errors caused by 
common-mode voltages, in example A, Guard is at 
nearly the same potential as the LO measurement ter- 
minal so that currents caused by common-mode voltage 
flows through Guard and not the measurement circuit, 
in example B, the 345SA guard switch is closed connec- 
ting guard to the LO input terminal. This allows 
common-mode current to flow through lead resistance 
Rb causing some measurement error. This connection 
may be used if common-mode voltages are not expected 
to be a problem. Example C is similar to A with the ex- 
ception that connecting guard in this manner allows any 
common-mode current generated between the source 
low and powerline ground to flow in the measurement 
circuit. 



NOTE 

The from panel guard pushbutton applies 
only for front panel inputs. Be sure to wire 
rear panel guard connections yourself, if- 
using the rear panel input terminals. 

3-46. Guirding Information. 

3-47. More detailed information on purpose and 
methods of guarding may be found in -hp- Application 
Note No. 123, “Floating Measurements and 
Guarding”. This application note is available through 
your nearest -hp- ^les and Service Office. 



3-6 




Model 34S5A 



Section 111 




Figure 3-3. Connecting the Guard. 



^CAUTIONH 

Guard should always be connected, either to 
the instrument LO terminal or to a point in 
the source circuit as indicated in Figure 3-3. 

If the guard terminal is left open, common- 
mode voltages may exceed the LO-io-Guard 
breakdown rating and damage the instru- 
ment. 

3-48. REMOTE OPERATION. 

3-49. General. 

3-50. The Model 3455A is remotely controlled by 
means of the Hewlett-Packard Interface Bus (HP-IB). 
The HP-IB is a carefully defined instrumentation inter- 
face which simplifies the integration of instruments, 
calculators, and computers into systems. 

NOTE 

HP-IB is Hewlett-Packard’s implementation 
of IEEE Sid. 488-1975, "Standard Digital 
Interface for Programmable Instrumenta- 
tion. " 



3-5 1 . The capability of a device connected to the Bus is 
specified by the interface functions it has. Table 3-2 lists 
the Interface Functions included in the Model 34S5A. 
These functions are also listed above the rear panel HP- 
IB connector (see Figure 3-1). The number following the 
interface function code indicates the particular capabili- 
ty of that function as listed in Appendix C of IEEE Std. 
488-1975. 



Tabls 3-2. HP-IB Interface Capability. 



Code 


Inierfsce Function 


SH1 


Source Handihske cepebiliiv 


AH1 


Acceptor Hattdshake Capability 


T6 


Talker (basic talker, serial poll, talk only mode, 
unaddiess to talk il addressed to listen) 


L4 


Listener (basic listener, unaddress to listen if 
addressed to talk) 


SRI 


Service Reauesi Capability 


RLl 


Remote/Local Capability 


PRO 


No Parallel Poll Capability 


DC1 


Device Clear Capability 


DTI 


Device Trigger Capability 


CO 


No Controller Capability 


El 


Open Collector Bus Drivers 



Interface Functions provide the means for a device to 
receive, process and send messages over the bus. 

3-52. Messages are the means by which devices ex- 
change control and measurement information. These 
messages permit communication and/or control bet- 
ween: 

Controller and Device(s) 

Device and Device(s) 

Controller and Controller(s) 

Table 3-3 lists the Bus Messages and gives a brief 
description of each. The messages are categorized by 
Bus function. 

3-53. Addrns Selaction. 

3-54. The "talk” and "listen” addresses of the 3455A 
are selected by the INSTRUMENT ADDRESS switch. 
This switch is a seven section "Dip” switch located on 
the rear panel (sec Figure 3-1). The five switches, labeled 
I through 5 are used to select a unique talk and listen ad- 
dress. Figure 3-4 lists the available address codes and the 
corresponding switch settings. The 3455A normally 
leaves the factory with the switch set to listen address 6 
and talk address V (decimal code 54). 

3-55. Talk Only (No Controllar). The 3455A may be used to 
provide measurement data to another device, such as a 
printer, without having a controller on the Bus. 
However, the device must be HP-IB compatible. The 
talk only switch must be set to the TALK ONLY posi- 
tion. In this mode the 3455A will output measurement 



3-7 











Section III 



Model 345SA 



Table 3-3. Bus Massaeat. 



Function* 


Message 


Description 


Device 

Communicsiion* 


Data 


Transfers device-depettdent infor- 
mation from one device to orte or 
more devices on the Bus. 


Device 

Control 


Trigger 


Cause* a group of selected devices 
to simultaneously imitate a set of 
device^ependent actions. 




Clear 


Causes an instrument to be set to 
a pre-defined state la certain 
range, function, etc.). 




Remote 


Permits selected devices to be set 
to remote operation, allowing 
parameters and device cKaracteris- 
tics to be controlled by Bus 
Messages. 




Local 


Causes selected devices to return 
to local (front panel) operation. 




Local 

Lockout 


Disables local (front panel) con- 
trols of selected devices. 




Clear 

Lockout 

and 

Local 


Returns all devices to local (front 
panel) control and simultaneously 
clears the Local Lockout Message. 


Interrupt 

and 

Rptriro 


Require 

Service 


Indicates a device's need for inter- 
action with the controller. 


Status 


Status 

Byte 


Presents status information of a 
particular device; one bit indioetes 
whether or not the device current- 
ly requires Service, the other 7 
bits (optional) are used to indi- 
cate the type of service required. 




Status 

Bit 


A single bit of device-dependent 
status information which may be 
logically combined with status bn 
information from other devices 
by the controller. 


Passing 

Control 


Pass 

Control 


Passes bus controller responsibili- 
ties from the current controller to 
a device which can assume the 
Bus sutwrvisory role, 


Bail 

Out 


Abort 


Unconditionally terminates Bus 
communications and returns con- 
trol to the system controller. 



data each time a measurement sample is made. Section 
of FUNCTION. RANGE. TRIGGER, etc. is ac- 
complished manually using the front panel controls. 

NOTE 

When the 34SSA is connected to a system 
with a controller, the TALK ONLY switch 
must be set to the off position. 

3-56. Program Codas. 

3-57. All front panel controls, except the LINE switch, 



GUARD switch, and SAMPLE RATE switches, are 
programmable from the Bus. The program codes for 
each control are listed in Table 3-4. The program codes 
can also be determined from the front panel markings. 
For multi-control features such as FUNCTION, 
RANGE, TRIGGER, and MATH the program code 
consists of the combination of the underlined letter in 
the control group heading and the position number of 
the particular control. See the following example: 



CONTROL GROUP CODE 
(UNDERLINEOI 






UfgCTION — 
tviAC 
>wv bO 



□ □ □ □ 



POSITtON 1 
PROGRAM FI 
CODE 



2 3 4 

F2 F3 F4 



«WII| i 

>0 Ttit 

□ □ 

S 6 

F5 F6 




3-8 





























Model 34S5A 



Section III 



Tables^. HP-IB Program Codes. 







Progratrt 




Control 


Code 




DC Volti 


FI 




AC Volts 


F2 


FUNCTION 


Fast AC Volts 


F3 




2 Wire kR 


F4 




4 Wire kR 


F5 




Test 


F6 




.1 


R1 




1 


H2 




10 


R3 


RANGE 


100 


R4 




1 K 


R6 




10 K 


R6 




AUTO 


H7 




Internal 


T1 


TRIGGER 


External 


T2 




Hold/Manual 


T3 




Scale 


Ml 


MATH 


Error 


M2 




Oft 


M3 


ENTER 


Y 

Z 


EY 

EZ 


STORE 


Y 

2 


SY 

SZ 


AUTO CAL 


Off 

On 


A« 

Al 


HIGH 


Off 


HO 


RESOLUTION 


On 


HI 


DATA 


Off 


00 


READY RQS 


On 


Dl 


BINARY 

PROGRAM 




B 



3-58. The program code for single control features 
which can only be programmed on or off (AUTO CAL 
and HIGH RESOLUTION) consist of the letter 
underlined in the control heading and the number “0” 
for off or the number **l” for on. This also applies to 
the DATA READY Request feature which is Bus pro- 
grammable only. 

Example: 



0 = off 

1 = on 

Program Code 
(ofO 
(on) 

3-59. Program codes for the ENTER and STORE 
features consist of the letter underlined in the control 



control code 
(underlined) 



AUTO 

CAC 

□ 



PATA 

■CAOr 

BOS 



94H 



A0 

Al 



1X9 

Dl 



heading and the underlined letter of the particular con- 
trol. 



Example: 



control group code 
(underlined) 




CNTCN 



control codes 
(underlined) 






^ad«-47«4 



program code EY EZ SY SZ 
3-60. The program code of the BINARY PROGRAM 
feature consists of only the underlined character in the 
control heading (B). 



3-81. Data Maataget. 



3-62. The major portion of communications transmit- 
ted over the Bus is accomplished by data messages. Data 
messages are used by the controller to program the 
Model 34SSA and are used by the 34SSA to transmit 
measurement data. These functions are explained in the 
following paragraphs. 



3-83. Programming. The 345SA is programmed by means 
of data messages sent over the Bus from the controller. 
These messages are composed of two parts — the ad- 
dress command and the program information. The ad- 
dress command contains the "talk” and “listen” ad- 
dresses of the devices involved; in this case, the talk ad- 
dress of the controller and the listen address of the 
34S5A. The program information contains the codes of 
the 345SA controls to be programmed. Syntax of the ad- 
dress command portion of the data message is depen- 
dent upon the controller being used. For the proper syn- 
tax refer to the controller manual. Syntax for the pro- 
gram information portion consists of the program codes 
listed in Table 3-4. 



Example program data messages: 



Address 

Command 



3455A Program 
Infonnation 



CMD-’Ub". -FI R3 M iiJ M3 13 



output to J 
the bus 

unlisicn 

command 
controller _ 
“talk" address 
3455A 

“listen" address 



I HOLD/ 
••MANUAL 
TRIGGER 

-MATH off 



HIGH RESOLUTION 
on 

AUTO CAL off 



10 V RANGE 



DC Volts FUNCTION 



Program data message using the 9830A Calculator. 



3-9 





Section III 



Model 3455A 



Address 3455A Program 

Command Information 



wrt 722. -FI R3 A0 Hi M3 T3" 

3455A listen 

L — ■ - address 

output to the (decimal equivalent) 

bus, includes 

the unlisien command 

and calculator talk 

address 



Program data message using the 982SA Calculator. 



3-64. Eataring MATH Censtants (Y and Z) from tha Bat. The 
following data message illustrates the program informa- 
tion necessary to enter numbers into the Y and Z 
registers: 

Address Program 

Command Information 



(refer to Controller 
Manual) 



'EY 123.456 SY EZ 45.6789 SZ " 



Enters number 
in “Z” Register 

Programs the 



L 3455A to store 
the displayed 
number in the 
“Y” Register. 

Number to 

be entered 

Programs the 

3455 A to enter 

numerical data 
into the display 



addresses controller to 
“talk" and 34S5A to “listen” 



The number stored in the Y or Z register can be read 
from the Bus by programming the ENTER feature and 
the particular register. This transfers the number from 
the storage register specified to the display. The number 
displayed is output to the Bus by addressing the 34S5A 
to "talk". The number is returned to the storage 
register by programming the STORE feature and the 
desired register. The following example illustrates how 
to read the numbers stored in the Y and Z register from 
the Bus: 

Address 

Command 



wrt 722 . “EY" 



Addresses the 
controller (9825A) 
to “talk" and the 
3455A to “listen” 




Transfers the number 
stored in the Y register 
into the 3455A display 



red 222 . A ; ^ 



P A 



Addresses 
the 34S5A 

to “talk" and 1 

the controller 
(9825A) to 
“listen” 



Outputs the contents of 
the controller’s “A" register 
to the display 

Specifics the 
controller register 
to receive the 
number 



wrt 722 . "SY" 

Addresses the Returns the number in 

controller (9825A) to J the 3455A display to the Y 
"talk" and the 345SA register 

to "listen" 

3 85. Data Raady Raquaat The DATA READY Request 
feature permits the 34S5A to signal the controller upon 
the completion of a measurement. This feature would 
normally be used where the 3455A is triggered from an 
external source. In this mode of operation, the 34SSA is 
programmed to the appropriate measurement 
parameters (FUNCTION, RANGE, etc.). The con- 
troller is then free to control other instruments on the 
Bus. Upon being triggered, the 3455A makes a measure- 
ment and outputs a “Require Service" message to 
notify the controller that the measurement information 
information is ready. Upon receiving the service re- 
quest, the controller with serial poll the 34SSA to deter- 
mine the nature of the service request. Upon being poll- 
ed, the 3455A outputs a status byte, in this case the 
ASCII character “A" (decimal 65), indicating the 
measurement data is ready. The controller then disables 
the serial poll and reads the measurement data. The pro- 
gram codes for the DATA READY RQS feature are: 

D0 Data Ready Request off 

Di Data Ready Request on 

3-66. Binary Program Faatara. The BINARY PROGRAM 
feature permits the status of the FUNCTION, RANGE, 
TRIGGER, MATH, AUTO-CAL and HIGH RESO- 
LUTION controls to be determined or programmed 
from the bus in four 8-bit binary words. The BINARY 
PROGRAM feature allows faster programming of the 
345SA by reducing the number of program data bytes 
from a maximum of 12 for normal programming to 4 
data bytes for binary programming. The BINARY 
PROGRAM codes can also be read and stored by the 
controller to re-program the 345SA at a later time (see 
Appendix A). One important thing to remember is to 
send a "B" to the 3455A in order to put the instrument 
into the BINARY mode. Table 3-5 lists the allowable 
BINARY PROGRAM codes for each of the four data 
bytes and the front pane] keys they control. 



3-10 




Model 3455A 



Seclton 111 



3-67. The following data message examples illustrate 
how to read or program the front panel control of the 



Table 3-5. BINARY PROGRAM Codes. 



f irti BINARY enOGRAM 0*u Byla 



ControH AIfKtM. SCALE, % ERROR. OFF IMATHl 



To f 


1 Pro«i*ni CoBc 


ASCII 

CHAR 


DECIMAL 

CODE 


OFF 




ss 


TERROR 


• 


61 


SCALE 


> 


62 



Second BINARY PROGRAM 0>i< Bv<« 

Control* AfftciM AUTO CAL. AUTO RANGE. HIGH RESOLU 
TION. HOLD/MANUAL. EXTERNAL. INTERNAL 



To Proflrtm 






PROGR 


AM CODE 


AUTO 


AUTO 


HIGH 




ASCII 


1 DECIMAL 


CAL 


RANGE 


RESOLUTION ! 


TRIGGER 


CHAR 


' CODE 


Oil 


Oil 


OH 


HoM)/U»nu*l 




SB 








EkMrn«l 


- 


61 








Innrnkl 


> 


63 


Oil 


Oil 


On 


HoM/Mnuai 


3 


St 








Ekt*m*l 


6 


S3 








lni«rn*l 


6 


S4 


Oil 


On 


OH 


Hold/M»nutl 


♦ 


43 








EABrnil 


- 


4S 












46 


Oil 


On 


On 1 


Hold/Mnnuil 


# 


3S 








ExtarA*! 


% 


37 








Internal 


B 


38 


On 


Oil 


OH 


f^nuai/Hold 


1 


01 








Extarnal 


1 


03 








Internal 




04 


On 


on 


On 


Manual/ Hole* 


S 


63 








Enarnal 


U 


SS 








Internal 


V 


86 


On 


On 


OH 


Manual /Ho*d 


K 


75 








External 


M 


77 








Internal 


N 


78 


On 


On 


On 


M«nutl/Hola 


C 


67 








EiTarna* 


E 


60 








Incernal 


F 


70 



TNva BINARY PROGRAM Ool* Bvie 



Control* AfIcciM’ 10 K, 1 K, 100. 10. 1, I (RANGE) 



To Fro 9 ra«n 


1 Pro^remCotfe 


ASCII 

CHAR 


DECIMAL 

CODE 


to K 


_ 


05 


1 K 


/ 


47 


100 


7 


SS 


to 




SB 


1 


• 


61 


1 


> 


62 



Fourlh BINARY PROGRAM Oou Bvtt 

Conitoli AlloeiM TEST. 4 WIRE kO. 2 WIRE kO. FAST ACV. 
ACV, OCV IFUNCTIONI 



To Frogrem. 


1 Profxm Cod* 


ASCII 

CHAR 


DECIMAL 

CODE 


TEST 


_ 


05 


4 WIRE kfl 


/ 


47 


3 WIRE ktl 


7 


56 


FAST ACV 




S0 


ACV 


- 


61 


DCV 


> 


63 



3455A. To read control status: 



wrt 722. “B” 



Address the 

3455AIO 

"listen" 



Set the 345 SA to (he 
BINARY PROGRAM 
mode 



Since normally four data bytes are used in Binary pro- 
gramming, the 345SA may indicate an SRQ condition 
when only a “B” is sent. 



red 722 



Address the 3455A I 

to "talk” 

The 3455A, after receiving the "talk” command, will out- 
put the front panel control status codes (4 bytes). As an 
example, if the front panel controls were in the "turn-on” 
state, the 3455A would output the following codes: 



N 



MATH OFF 



AUTO CAL ON 
AUTO RANGE ON 
HIGH RESOLUTION OFF 
INTERNAL TRIGGER 



> 

1 DC Volts FUNCTION 



1 Volt RANGE 
(depends on input applied) 



To program front panel controls: 



wrt 722, "B ;K/ = 



Address the 

3455Ato * 

•listen” 

Sei3455Ato 
BINARY PROGRAM 
mode 



Desired program 
codes (see Table 3-5) 



3-68. MMBurMMflt Data. Measurement data is output by 
the 3455A in the following general format: 



OUTPUT FORMAT: 

Polarity of measurement 
(does not apply to ACV 
or OHM measurements) 



± nnnnPDDE t ddcrlf 



CRLF 



Terminates 

message 



Measurement reading I 

expressed in scientific ‘ 

notation 

This format is printed in the lower left corner of the 
3455A front panel for convenience. The following is an 
example of a data message output by the 3455A: 





Section III 



Mode! 3455A 



Input to 345SA: -143.5 volts DC 

Output Data Message: -1.435000 E -t- 02 CR 

LF 

The 3455A will output a measurement data message 
when addressed to “talk**. The syntax for addressing 
the 3455A is dependent upon the controller being used. 
Refer to the Operating Manual of your controller for in- 
structions. 

NOTE 

An overload measuremeru is indicated by an 
E ■¥ 10 exponent in (he HP-IB measurement 
data. The large exponent is (he key. 

Also, note that the LF character (concurrent 
with EOl) is the last character in the data 
message and must be handshook from the 
34SSA to complete (he measurement 
transfer. 



3-69. Davies ContrgI Messages. 

3-70. Device control messages are issued by the system 
controller to manage instruments on the bus. These 
messages are controller dependent. For specific infor- 
mation as to syntax and procedures to transmit the con- 
trol messages, refer to the Operating Manual of the con- 
troller being used. 

3-71. The following paragraphs describe the 3455A 
response to the various control messages. 

3-72. Trigger Meessge. The trigger message causes the 
3455A to initiate a measurement cycle. The 3455A must 
be addressed to “listen” in order to recognize the trigger 
message. The measurement results of the 3455A depend 
upon the control settings (FUNCTION, RANGE, etc.) 
at the time the trigger message is received. 

3-73. Clear Masuga. Upon receiving the clear message, 
the 3455A sets the front panel controls to their “turn- 
on” state. The turn-on state is as follows: 



FUNCTION DC VOLTS 

RANGE AUTO 

TRIGGER INTERNAL 

MATH OFF 

AUTO CAL ON 

HIGH RESOLUTION OFF 

DATA READY RQS OFF 

BINARY PROGRAM OFF 



The 345SA will respond to the device clear message 
whether addressed to “listen” or not. To respond to the 
selected device clear message, the 3455A must be ad- 
dressed to listen. 



3-74. Remote Message. The 3455A will go to Remote 
(Bus) control when the remote message, in conjunction 
with its “listen” address, is received. Remote operation 
is indicated when the REMOTE indicator, located 
above the display, is lit. During remote operation, the 
front panel controls cannot be operated manually. 

3-7S. Local Message. The local message returns the 
3455A to LOCAL (manual) control. The 3455A can 
also be returned to local control by pressing the front 
panel LOCAL button. Some circuits of the instrument 
may also be in local operation when a local message is 
send to another instrument on the HP-IB. 

7-7B Local Leckoet Message. The local lockout message 
disables the front panel LOCAL control. In the local 
lockout mode, the 345SA cannot be returned to local 
operation from the front panel. 

3-77. Clear Lockout and Local Message. The 3455A will set 
the front panel to LOCAL (manual) operation and 
enable the LOCAL control upon receiving the clear 
lockout and local message. 

3-78. Intemipt end Device Status Massages. 

3-79. The interrupt and device status messages permit 
the 3455A to notify the controller when an error in pro- 
gramming information or measurement output data oc- 
curs. The 3455A also uses these messages to notify the 
controller when measurement data is available if the 
DATA READY REQUEST feature is programmed. 

3 80. Rsquira Service Message. The following conditions 
will cause the 345SA to output a Require Service (SRQ) 
message. 

a. Data Ready. If the DATA READY REQUEST 
feature is programmed, the 3455A will output an SRQ 
message upon completing the required measurement. 

b. Syntax Error. The 3455A will output an SRQ 
message if a program code other than those listed in 
Table 3-4 is received. For example, the program code 
“F7” would cause a syntax error since the FUNCTION 
program set only contains codes FI through F6. 

c. BINARY PROGRAM Error. The 3455A will out- 
put an SRQ message if a BINARY PROGRAM code 
other than those listed in Table 3-5 is received. 

d. Trigger Too Fast. An SRQ message will be output 
if the 34S5A is triggered while outputting data to the 
bus. This condition most commonly occurs if the 3455A 
is programmed to INTERNAL TRIGGER during bus 
operation. The front panel SRQ indicator is lit when the 
3455A requires service. The Require Service message 
can be cleared by serial polling the 3455A or by clearing 
the 3455A. 



-'•12 




Model 34SSA 



Section 111 



3-8t. Statdi Bytt M«t» 9 e. The status byte message is 
output by the 34SSA in response to a serial poll and in- 
dicates, to the controller, the nature of a service request 
message (SRQ) from the 34SSA. The following is a list 
of the basic status byte codes output by the 34SSA; 



Status Byte Code 

ASCII ^ , 

CHAR 




A 


6S 


Data Ready • indicates to the con- 
troller that rneasuremeni data is 
available. Applies to DATA 
READY Request feature. 


B 


66 


Syntax Error - Indicates improper 
1 program code. Example ■ Pro- 
gram Code "F7" would cause a 
, syntax error since the FUNC- 
1 TION program set is only defined 
for codes FI through F6. 


D 


68 

1 


' BINARY FUNCTION Error - In- 
dicates improper BINARY PRO- 
GRAM code or incomplete binary 
message. Similar to syntax error. 


H 


! 72 


Trigger too Fast • Indicates the 
3455A has been triggered while 
measurement data is being output 
to the bus. Warns of possible in- 
correct measurement information. 



it is possible for more than one of the basic status byte 
messages to be true. In this case the resulting status byte 
code would be the combinttuion of the basic status byte 
codes being output. As an example, the resulting ct^e 
for the combination of the syntax error and trigger too 
fast messages would be ASCII character J decimal code 
74. The following illustrates the status Byte message in- 
dicating the purpose of each relevant "bit". 

STATUS BYTE MESSAGE 




3-B2. DATA OUTPUT CHAFIACTERISTICS. 

3-83. The protocol used by the 34SSA to output 
measurement data must be followed in order to preserve 
proper data transfer over the HP-IB, the following 
notes on data transfer over the HP-IB may be helpful: 

a. If a reading has been taken and thus resides in the 
output buffer, the buffer is not considered busy until 
the output handshaking begins. Thus, a new trigger will 
indicate a measurement and the new reading will replace 
the old reading. The old reading is lost and there is no 
SRQ condition. 

b. Once the Hrst character of measurement data has 
been handshaken out, the buffer is considered busy un- 
til one of the following occurs: 

1. The balance of the reading is handshaken out. 

2. “Device" or "Selected Device" clear is given. 

3. The 34SSA power is interrupted, triggering 
white the buffer is busy will lose the new 
reading and cause a "Trigger too Fast” SRQ 
condition. 

c. When triggering and taking measurements in a 
loop, sufficient time must be allowed for the 345SA to 
perform the entire A-To-D measurement cycle and buf- 
fer data to become available after the first reading. The 
"Wait" statements in many 9800 series calculators are 
convenient methods to avoid outputting the previous 
buffer contents. This condition shows up as being "One 
reading behind" in your measurement sequence. 

d. If you know the output buffer is not busy, but 
don't know whether it is full or not, sending a "device" 
or selected device" clear followed by reprogramming 
the desired conditions is a safe way to clear the output 
buffer. 

3-14. Bail Out MessagB. 

3-15. Abort. The Abort message unconditionally ter- 
minates all Bus communications and returns control to 
the system controller. Only the system controller can 
send the Abort message. Refer to the Operating Manual 
of the controller being used for instruaions on sending 
the Abort Message. 

3'BB. Instrumont Mtaauroffloiit Timoi (Remots Control). 

3-87. In the Remote Operating mode, the 34SSA takes a 
certain amount of time to respond to a trigger message. 
The overall time depends on the range, function, and 
particular controller used. This time may also vary from 
instrument to instrument. Table 3-6 gives the typical 
measurement times, using the HP-IB. These times are 
not part of the operating specifications of the instru- 

.'•l.l 




Section III 



Model 3455A 



ment, and are only provided as additional information 
for HP-IB system use. The following is an explanation 
of the various times involved in a measurement se- 
quence. 



troller), HPL (-hp- Model 982SA Controller) and 
Enhanced Basic (-hp- Model 983SA/B and 9843A/B 
Controller) languages. The examples in the Appendix 
can be helpful when you write programs for the 34SSA. 



a. ij (Typical Input Data Transfer Time): This is the 
typical time it takes to transfer input data (set the 34S5A 
to a certain function and range, etc) from a controller to 
the instrument. The transfer time depends on the num- 
ber of ASCII character send to the instrument and the 
response lime of the controller. For example, to send an 
"FIT3” message to the instrument lakes four charac- 
ters. 

b. l2 (Typical Input Settling Time): The instrument 
is triggered (HP-IB, External, or Hold/Manual Trigger) 
and the 3455A begins to take a reading. This time con- 
sists of the settling lime of the input relays, FETs, and 
other circuits. 

c. t3 (Typical Measurement Time): The input mea- 
surement is taken at this time. This includes the A-to-D 
conversion time. 

d. l4 (Typical Compulation Time): When the 
measuring and the A/D operations are completed, the 
instrument’s internal main controller circuits calculates 
the correa measurement reading. This time is the 
amount of the time it takes to complete the calculation. 

d. IS (Typeial Output Data Transfer Time): The 
34SSA now sends the reading to the HP-IB output buf- 
fers to be transferred to the controller. This time also 
depends on the response time of the particular con- 
troller. 

3-18. Renata Pragraomiag Exinplat. 

3-89. Appendix A at the end of this manual has Remote 
Programming examples for the 34SSA. These examples 
are given in the HP Basic (-hp- Model 9830A/B Con- 



3-80. OPERATORS CHECKS. 

3-91. The TEST feature provides a convenient method 
of testing the basic operational capabilities of the Model 
34SSA. This test plus an operational check of the Ohms 
and AC functions tests the major portion of the 34SSA 
circuitry. Keep in mind the following checks lest only 
the operating capability of the 34SSA. They do not 
check the performance accuracy. 

3-92. BENCH USE. 

3-93. The following sequence may be used to manually 
check operational capability of the 34SSA. 

a. Set the 3455A to AUTO RANGE. 

b. Press the TEST button. The display should be 
blank while the 34S5A is performing the self test. Upon 
successful completion of the test, all front panel in- 
dicators (except the REAR TERMINAL indicator) will 
light and a reading of + 8888888 with all decim^ lit 
will be displayed. The self test will be repeated until 
another function is selected. 

c. Connect a short across the INPUT terminals. 

d. Press the 2 WIRE kO button. The front panel 
display should read .00000 ± 300 milliohms. 

e. Press the ACV button. The display should read 
.00000 ± 600 microvolts. 

3-84.HP-IB OpwitiM. 

3-93. Figure 3-3 shows the steps necessary to perform 
the 34SSA operators check from the Bus. 



Tabla 3-6. Typical HP-IB Coatrollad Maasaremant Tiract. 









' ' 1 


*04* Sdisit T««« 






Owipm Dave ftsnef*' 
T«n» 


















ftfACMA 












PC VM 




•OM* 




1 


• • 


Mimtm 1 vt« 10 V 








14** 






9l 










WH> 








144 mme f«r 100 8A4 








niG 




19 efMC 




1000 vIImm 


















PU8 (d*N 0 

rK« toemtmr 9444A 






B'g ' 






illaaae 








40 a« 










yiaga un»«8ii 4 I 




1 * t ' 1 


“BH- 




147 MMC 






14 






40 M( 


ClMHilf 


«.» 


a* .... 










^15 ■ 




14«Mg 


44 Me 














1 7 


44 emme 








AwMCM ON 


ni« ' 




TT^ 


44 «MC 














S 














77 wa^c 


990 "me 








N^NaiNiBl" ON 


40 He 




%y .... 










Nm8»C#0N 


Un« 




99 


tS "me 














%• 


— 






MMillH 








*2ernm< 




11 mm 0 NiW9ea 




^••1 AC Ven« 
















gUtgf 


,W.W_ 













M Ifm tom 



.^•14 



•Mtt ti VmM N* wtM tm Msti « M 

^Ma» iMa 9 M t 















Model 3455A 



Section IV 



SECTION IV 

PERFORMANCE TESTS 



4-1. INTMOUCTIOII. 

4-2. This section contains performance and operational 
verification test procedures which can be used to verify 
that the 345SA meets its published specifications (listed 
in Table M). All tests can be performed without access 
to the interior of the instrument. The performance tests 
in this section do not test the 345SA Math Functions or 
HP-IB Interface. These functions can be tested using 
the operators test procedures included in Section III. 

4-3. EQUIPMENT REQUIRED. 

4-4. The test equipment required for the performance 
tests is listed at the beginning of each procedure and in 
the Recommended Test Equipment Table in Section I. 
If the recommended equipment is not available, use 
substitute equipment that meets the critical specifica- 
tions given in the table. 

4-S. PERFORMANCE TEST CARD. 

4-6. Performance Test Cards are provided at the end of 
this seaion for your convenience in recording the per- 
formance of the 34S5A during either test. These cards 
can be removed from the manual and used as a perma- 
nent record of the incoming inspection or of a routine 
performance test. The Test Cards may be reproduced 
without written permission from Hewlett-Packard. 

4-7. CALIBRATIDN CYCLE. 

4-8. The 3455A requires periodic verification of perfor- 
mance. The performance should be tested as part of the 
incoming inspection and at 90-day or 6-month intervals, 
depending on the environmental conditions and your 
specific accuracy requirements. Two tests (performance 
and opertional verification) are provided in this section. 
The operational verification test should be performed as 
an incoming inspection of the instrument. The complete 
performance test can be used at the 90-day or 6-month 
intervals, and following a complete calibration of the in- 
strument. 

4-9. INPUT TERMINALS/CONTROL SEHINQS. 

4-10. Unless otherwise specified, the test signals for the 
performance tests can be applied to either the front or 
rear INPUT terminals. All tests must be performed in 
the INTERNAL Trigger Mode with AUTO CAL on and 
MATH off. For standard instruments (rms converter) 
the rear panel AC - AC/DC switch must be in the ac 
position. Other control settings are included in the test 
procedures. 



4-11. PERFORMANCE TEST FAILURE. 

4-12. If the 3453A fails any of the performance tests or 
operational verification test, perform the adjustments 
outlined in Section V. If the problem cannot be cor- 
rected by the adjustment, refer to Section VIII for 
troubleshooting information. 



4 13. SPECIFICATION BREAKDOWN. 

4-14. The dc, ac and ohms accuracy specifications 
(Table 1-1) are grouped according to the selected instru- 
ment function, i.e.. High Resolution On or Off, ACV 
or Fast ACV and 2-Wire or 4-Wire ohms. Within each 
group there are three sets of specifications: 

a. 24 hour (23*C ± PC) 

b. 90 day (23°C ± 5®C) 

c. 6 months (23*C ± 5*Q 

4-15. The time period over which a set of specifications 
applies is relative to the time the instrument is initially 
adjusted at the factory or is properly readjusted accor- 
ding to the procedures outlined in Section V. Before 
proceeding with the dc, ac and ohms accuracy tests, it 
will be necessary to determine which set of specifica- 
tions applies to your instrument. If the instrument has 
just been received and is to be tested as part of the in- 
coming inspection, test for the 90-day specifications. If 
the instrument has been readjusted within a period of 24 
hours, test for the 24-hour specifications. Test limits for 
the 24-hour and 90-day specifications are included in the 
tables for the accuracy tests. Test limits for the 6-month 
specifications must be derived from the specifications 
listed in Table 1-1. If the instrument is operated outside 
for the temperature range for a given set of specifica- 
tions, the appropriate temperature coefficients, listed in 
Table 1-1, must be added to those specifications. The 
test limits given in the tables for the dc, ac and ohms ac- 
curacy tests do not include temperature coefficients. 

4-16. Each set of specifications includes an accuracy 
specification for each voltage or ohms range. Accuracy 
is specified as a percentage of reading plus an add-on of 
one or more digits (counts). For example, the 24-hour 
DC Accuracy specification for the 1-volt range (High 
Resolution OfO is: 

± (0.0031^0 of reading + 1 digits) 

At full scale (1 V) the least significant display digit, 
equal to 10 microvolt, is O.OOI^o of reading. The full- 
scale accuracy is therefore: 



4-1 




Section IV 



Model 34SSA 



± (0.003% + 0.001%) = ± 0.004% of reading 

Similarly, at one tenth of full scale (O.I V) the least signifi- 
cant digit (10 microvolt) is equal to 0.01% of reading so the 
accuracy specification is: 

± (0.003% + 0.01%) * i 0.013% of reading 

These specifications do not include the temperature coeffi- 
cient that must be added if the instrument is operated out- 
side of the 22°C to 24°C range. 

4-17. DC ACCURACY TEST CONSIDERATIONS. 

4-18. Because of the high dc accuracy of the 34SSA, a 
precision dc calibration standard is required to verify that 
it meets its dc accuracy specifications. To thoroughly test 
the performance on all ranges, the standard must be capable 
of delivering outputs within the range of 0.10000 V dc to 
1000.000 V dc. The accuracy of the standard must be such 
that its errors do not introduce significant uncertainties in 
the 34S5A test readings. Ideally, the accuracy of the stand- 
ard should be ten times better than the 34S5A specifica- 
tions being tested — a ten to one error reduction nearly 
eliminates measurement uncertainties caused by the stand- 
ard. To test accuracy specifications on the order of 
± O.00S% of reading, however, a standard with a specified 
accuracy of t 0.0005% (S ppm) would be required. Since 
this type of accuracy, over the range needed to completely 
test the accuracy of the 34SSA, is generally not available 
outside of a standards laboratory, some compromises may 
be required. If you have access to primary in-house (NBS 
certified) standards or have calibrated transfer standards 
that are capable of delivering the required output voltages, 
we recommend that you use them. If you do not have 
access to such facilities you may. depending on your specif- 
ic accuracy requirements, choose to do one of the follow- 
ing: 

a. Use a dc calibration standard that is four or five 
times more accurate than the 34SSA specifications to 
be tested. (A discussion of the potential uncertainties is 
given in following paragraphs.) 

b. Use a highly stable calibrated standard and add the 
correction factors (given on the calibration chart) to the 
34SSA test readings. 

c. Send the 3455A to an -hp- Service Center or some 
other NBS-certified standards facility for calibration. 

4-19. Several of today’s commercially available dc calibra- 
tion standards provide the output voltage range and resolu- 
tion needed to test the performance of the 34S5A but they 
are not, in general, an order of magnitude more accurate 
than the 34SSA. When using such standards it is important 
to be aware of the uncertainties or “ambiguities” that may 
be encountered. These potential ambiguities are described 
in the following paragraphs. 

4-20. First, consider the case where a digital voltmeter 
(DVM) is to be tested for a full-scale accuracy of ± 0.01% 



of reading on its 1-volt range. Ute DVM is cormected to a 
dc calibration standard u^ose specified accuracy is ± 
0.001% of setting and with the standard set to -t- 1.00000 V, 
the DVM reads +0.99992 V which is 0.008% low. The dc 
standard's specified accuracy is ten times better than the 
specification being tested and at 1 V its maximum error 
contribution to the DVM reading is 10 microvolt or 
0.001%. If the standard is 0.001% low the actual DVM 
error is • 0.007%; if it is 0.001% high, the actual DVM error 
is - 0.009%. In either case the DVM is within its specifica- 
tion and, since this measurement is not a calibration but is 
only intended to verify that the DVM meets its specifica- 
tion, the standard’s error can be ignored. 

4-21. But what if the DVM reading is + 0.999908 V? Here, 
the DVM appears to be in tolerance (0.0092% low) but the 
margin is only 0.0008% which is less than the 0.001% maxi- 
mum allowable error contribution of the standard. If the 
standard’s output is 0.001% low, the actual DVM error is 
- 0.0082% rather than • 0.0092% so the DVM is within its 
specification. If. on the other hand, the standard's output is 
0.001% high, the actual DVM error is - 0.102% and the 
DVM is slightly out of tolerance. Chances are good that the 
DVM is within its specification but the only way to tell for 
sure is to use a more accurate standard. As the example 
points out, there are regions of ambiguity even when the 
standard is ten times more accurate than the instrument 
being tested. With a ten-to-one error reduction, however, 
these regions are relatively narrow. In this case, the DVM 
could be out of tolerance but if so, its maximum out-of- 
tolerance error is only - 0.0002%. As long as the DVM 
reading is within specified tolerances, the maximum DVM 
error that can exist is ± 0.011% which is the sum of the 
maximum DVM error and the maximum allowable error 
of the standard. A potential deviation of ± 0.001% from the 
DVM specifications could, in many cases, be acceptable. 
Also, if the standard has been recently calibrated and is 
known to be well within its specification, readings in the 
narrow ambiguous regions may reflect marginal DVM per- 
formance or indicate the need for adjustment. 

4-22. Now suppose the dc standard's specified accuracy is 
± 0.0025% — only four times better than the 1 0.01% DVM 
accuracy specification. If the DVM reading is + 0.999890 
volt, it appears that the DVM is 0.011% low. However, if 
the dc standard is 0.002% low (well within its specification) 
the DVM is only 0.009% low and is in tolerance. Con- 
versely, if the DVM reading is + 1.00081 V the DVM 
appears to be 0.0081% high and well within its specifica- 
tion. But if the standard is 0.0023% low, the actual DVM 
error is + 0.014% and the DVM is out of tolerance. 

4-23. Figure 4-1 shows how the error tolerances of the 
standard combine with those of the DVM to produce the 
positive and negative ambiguous regions used in the pre- 
ceding examples. From Figure 4-1, the following observa- 
tions can be made: 

a. If the DVM reading is in tolerance by a percentage 
that is greater than the maximum allowable error of the 
standard, the DVM is definitely within its specification. 



4-2 




Model 3455A 



Section IV 




b. If the DVM reading is out of tolerance by a per- 
centage that is greater than the maximum allowable error of 
the standard, the DVM is dermitcly outside of its specifica- 
tion. 

c. If the DVM reading is in or out of tolerance by a per- 
centage that is less than the maximum allowable error of 
the standard, it is in one of the ambiguous regions (shaded 
areas) shown in Figure 4-1. The DVM may or may not be 
within its specification and the only way to tell for sure is 
to use a more accurate standard. 

4-24. As the accuracy specifications of the standard 
approach the specifications of the DVM to be tested, the 
ambiguous regions sliown in Figure 4-1 become wider and 
the uncertainty contributions of the standard become 
increasingly significant. If the standard is less than three or 
four times more accurate than the DVM. the performance 
test is not practical because the ambiguous regions cover 
most of the DVM’s error range. From a practical stand- 
point, the dc standard should be at least five times more 
accurate than the 34S5 A specifications to be tested. If such 
a standard is nut available, an alternative approach is to 
use a calibrated standard that is extremely stable and (pre- 
ferably) two to four times more accurate than the 3455A. 
When this is done, the correction factors given on the 
dc standard’s calibration chart must be algebraically added 
to the 34SSA test readings. Test validity depends on the 
calibration uncertainties and the short-term stability of 
the standard. 

4-25. The Reference Divider recommended in the follow- 
ing DC Voltmeter Accuracy Test is, according to its pub- 
lished specifications, accurate enough to test all but the 
1- volt and 10- volt full-scale 24-hour specifications. The 1- 
volt and 10- volt full-scale specifications can be tested using 
the DC Transfer Standard also recommended in the pro- 
cedure. 

4-26. OPERATIONAL VERIFICATION TESTS. 

4-27. DC OPERATIONAL ACCURACY TEST. 

4-28. The DC Transfer Standard required for the 
following test must be calibrated to a 1.017 V to 1.019 V 
standard cel) that has been calibrated by the National 
Bureau of Standards (NBS). If the 345SA is to be tested 
for its 24-hour accuracy specifications, the Transfer 
Standard must be adjusted for optimum 1-volt and 



10-volt output accuracy using NBS-calibrated stan- 
dards. It is recommended that the Transfer Standard be 
calibrated and adjusted just prior to use. After calibra- 
tion, it should be left on and, if possible, kept in a con- 
trolled environment where the ambient temperature is 
within one or two degrees of the temperature in which it 
was calibrated. The following procedure should be per- 
formed in that same environment. 

4-29. If the recommended DC Transfer Standard or its 
equivalent is not available, an NBS-calibrated standard 
cell (1.017 V to 1.019 V) can be substituted. If this is 
done, check the full-scale accuracy of the 345SA 1 V and 
10 V ranges using the Reference Divider recommended 
in the procedure. 

4-30. Tatt Procwlura. 

Equipment Required: 

Reference Divider (Fluke Model 7S0A) 

DC Transfer Standard (Fluke Model 731A) 

DC Standard (Systron Donner Model M106A) 
DC Null Voltmeter (-hp- Model 419A) 

a. Set the 34SSA controls as follows: 



FUNCTION DCV 

RANGE 1 V 

HIGH RESOLUTION ON 

AUTO CAL ON 

GUARD ON 

TRIGGER INTERNAL 



b. Set the DC Transfer Standard for an output of 1 
V. Connect the output of the transfer standard to the 
3455A INPUT. 

c. The 34S3A reading should be within the test limits 
listed in Table 4-1 , verifying its 1-volt full-scale accuracy 
with High Resolution on. 

d. Set the 3455A RANGE to 10 V. The 3455A 
reading should be within the test limits listed in Table 
4-3, verifying its 10-volt tenth scale accuracy with High 
Resolution on. 

e. Set the Transfer Standard for an output of 10 V. 
The 345SA reading should be within the test limits listed 
in Table 4-1 verifying its 10-volt full scale accuracy with 
High Resolution on. 



Table 4-1. DC Accuracy Tast (1 V. 10 V Full Scala; High 
Ratolutioa On). 



Lflvei 


Range 


24 Houi 
Te$( Llmiit 


90 Day 
Test Limits 


1 V 
10 V 


1 V 
10 V 


0 999966 to 1 .000034 
9.99977 to 10.00023 


0.999936 to 1.000064 
9.99947 to 10.00063 



f. Set the 3455A HIGH RESOLUTION to OFF. The 
34SSA reading should be within the test limits listed in 



4-3 





Section IV 



Model 3455A 




Figura 4-2. DC Accuracy Teat 



Table 4-2, verifying its 10-volt full scale accuracy with to 1000 V and center its course and fine adjustment con- 
High Resolution off. trols. 



g. Set the Transfer Standard for an output of 1 V and 
set the 3455A RANGE to 1 V. Set the 3455A GUARD 
to OFF; connect the 3455A GUARD terminal to the 
High INPUT terminal. 

h. Reverse the 3455A INPUT connection to obtain a 
negative 1 V reading. Repeat steps c through f to verify 
the 1 V and 10 V full-scale accuracy for negative 
readings. 

i. Disconnect the Transfer Standard from the 34SSA 
INPUT. Disconnect the GUARD terminal from the 
High INPUT terminal and set the GUARD to ON. 

j. Using short pieces of number 20 AWG (or thinner) 
insulated solid copper wire, connect the Transfer Stan- 
dard and DC Null Voltmeter to the Reference Divider as 
shown in Figure 4-6. 

k. Turn off the DC Standard’s output. Using 24" (or 
shorter) shielded cables equipped with banana-plug con- 
nectors, connect the DC Standard and the 34SSA to the 
Reference Divider as shown in Figure 4-2. 



Set the Reference Divider's Output Voltage switch to 
1000 V. 

o. Set the 34SSA controls as follows: 



FUNCTION DCV 

RANGE 1 kV 

HIGH RESOLUTION ON 

GUARD ON 



^CAUTIONj 

The dc standard’s output should be turned 
on and the voltage adjusted by upranging or 
downranging the standard whenever the 
standard’s output needs to be changed. If a 
345SA input voltage greater than 100 V is 
needed, the following procedure should 
always be followed. 

p. Turn the dc standard’s output on and by the 
following method adjust the standard for an output of 
+ 1000.00 V: 



l. Set the Standard Cell Voltage controls on the 
Reference Divider to correspond to the calibrated 
standard-cell setting on the Transfer Standard. Set the 
Transfer Standard to output the calibrated standard-cell 
voltage. 

m. Zero the DC Null Voltmeter on its 3 microvolt 
range and then set it to the 300 microvolt range. 

n. Set the Reference Divider’s Input Voltage switch 



1. Set the dc standard’s first decade to "0". 

2. Uprange the dc standard to the I(XX) V range. 

3. Increase the standard’s first decade so that 1000 
V is reached by increasing the voltage in 100 V 
increments. 

q. Set the Reference Divider’s Standard Cell switch 
to the Locked position. Adjust the dc standard’s output 



4-4 






Model 3455A 



Section )V 



voltage and vernier controls for a zero reading on the 
null meter. 

r. Downrange the Null Meter and adjust the 
Reference Divider’s course and fine controls for a null is 
obtained on the 3 microvolt range. 

s. Set the Reference Divider's Standard Cell switch to 
Open. Allow ten minutes for the Reference Divider to 
warm-up and stablize. 

t. Set the Reference Divider’s Standard Cell switch to 
Momentary and, if necessary, readjust the fine control 
for a null indication. Release the Standard Cell switch. 

u. The 34S5A reading should be within the Test 
Limits given in Table 4-3. (1000 V, 1 kV range), verify- 
ing the full-scale accuracy at -f 1000 V with High 
Resolution on. 

NOTE 

AUTO-CAL may have to be turned off 
when making measurements on the 100 V 
and 1000 V ranges. This is only necessary 
when using a DC Standard sensitive to a 
changing load impedance. 



Table 4-2. DC Accuracy Tact {High Raaolution Off). 



Level 


3455A 

Range 


74 Hour 
Teet Limits 


90 Day 
Test Limits 


0-1 V 
10 V 1 


0.1 V 
10 V . 


.099992 to 1 00008 
9.9997 to 10.0003 


.099989 to .100011 
9.9994 to 10.0006 



NOTE 

Each lime the Reference Divider Output 
Voltage setting is changed, check for null 
and, if necessary, readjust the Reference 
Divider's fine control to obtain a null indica- 
tion. 

cautionJ 

Always downrange the Reference Divider 
before downranging the 34S5A. When 
upranging, always uprange lhe34S5A before 
upranging the Reference Divider. 



Table 4-3. DC Accuracy Teat (High Resolution On). 



Divider 

Output 


3455A 

Rinoe 


74 Hour 
Test Limits 


90 Day 
Test Limits 


1000 V 
100 V 
5 V 
1 V 


1000 V 
100 V 
10 V 
10 V 


999 957 to 1000.043 
99.9957 to 100.0043 
4.99987 to 5.00013 
0.99995 to 1.00005 


999.927 to 1000.073 
99.9927 to 100.0073 
4.99972 to 5.00028 
0.99992 to 1.00008 



'For positive readings onlV- Oo not apply negatiiA voltages greater 
than • 500 V de. 



v. Set the Reference Divider’s Output Voltage and 
345SA RANGE to each setting (100 V and below) listed 
in Tables 4-2 and 4-3 with High Resolution on or off as 
indicated. At each setting, the 34SSA reading should be 
within the Test Limits given in the table. (Be sure to 
maintain null when the Reference Divider's output is 
changed.) 

ynrvmmrrrrv^ 

|CAUTION4 

In the following tests for negative readings, 
the input to the 3455A must not exceed -500 
V dc, due to the ± 500 V guard to chassis 
limitation. 

w. Downrange the dc standard to 1 V output and 
turn off the dc standard’s output. Reverse the polarity 
of the 3455A INPUT connection to obtain negative 
readings. Turn the dc standard’s output back on. Verify 
the negative dc accuracy for all settings 100 V and 
lower. Again, do not apply more than -500 V dc to the 
3455A INPUT. 

4-31. AC Operational Accuracy Tact 

4-32. The 3455A ac voltmeter accuracy can be verified 
for frequencies up to 100 kHz on all voltage ranges us- 
ing an AC Calibrator such as the -hp- Model 
74SA/746A. To minimize measurement uncertainties 
for frequencies below SO Hz and above 20 kHz, the AC 
Calibrator should be calibrated and its error measure- 
ment control should be used to adjust out the errors in- 
dicated on the calibration chart. For example, if the 
calibration chart indicates that the 74SA output is 
0.047t high at 1 V, 50 kHz, set the 74SA error measure- 
ment control to -t- 0.047o to obtain a precise 1 V output. 
The 745A/746A can be calibrated during a routine per- 
formance test using the procedures outlined in the 
74SA/746A Operating and Service Manuals. Calibra- 
tion charts for these instruments are normally valid for 
at least 30 days. 

4-33. A Test Oscillator such as the -hp- Model 652A can 
be used to verify the ac voltmeter accuracy of the 3455A 
for frequencies above 100 kHz (specified for 1 V and 10 
V ranges only). The required accuracy can be obtained 
by adjusting the Test Oscillator output so that the 
345SA reading at 10 kHz is the same as the reading ob- 
tained with the highly accurate AC Calibrator. This 
reference level can then be maintained to within ± 
0.254'» over the 100 kHz to 1 MHz range using the 
expanded-scale meter on the Test Oscillator. If higher 
accuracy is desired, an ac-to-dc thermal transfer techni- 
que (Figure 4-3) can be used. 

4-34. Test Procaduru. 

Equipment Required: 

AC Calibrator (-hp- Model 745 A/746A) 

Test Oscillator (-hp- Model 652A) 



4-5 





Section IV 



Model 3455A 



TEST OSCILLATOR 



DIGITAL VOLTlieTER 




PROCEDURE: 

Apply accurate dc voltage II V or 3 V) from DC Starulard to 
Thermal Converter and adjust DC Differential Voltmeter for 
null. Disconnect the DC Standard and apply the Test Oscillator 
output to both the Thermal Converter and the 34S5A. Adjust 
the Test Oscillator output level for a null indication on the DC 
Differential Voltmeter. This makes the rms value of the ac input 
to the 3455A equal to the highly accurate output of the DC 
StarKfard. Repeat this procedure each time the Test Oscillator 
frequency is changed. 



Figure 4-3. AC/DC Thermal Transfer Measurement (Altarnete Frequency Response Test). 



a. Set the 3455A controls as follows: 



FUNCTION ACV 

RANGE 1 V 

GUARD ON 

INPUT SELECT FRONT 



b. Set the AC Calibrator for an output of 1 V, 30 Hz 
(745A 1 V range). Set the AC Calibrator’s error 
measurement control to offset the 1 V, 30 Hz error in- 
dicated on the calibration chart (745A 0. 1 error range). 

c. Connect the output of the AC Calibrator to the 
3455A front panel INPUT. 

d. 1 . Standard Model 34S5A: The 3455A 1 V. 30 Hz 

reading should be within the Test Limits listed 
in Table 4-4. 

2. 3455A Option 001: The 3455A 1 V, 30 Hz 
(ACV) reading should be within the Test Limits 
listed in Table 4-6. 

e. 1. Standard Model 34SSA: Using the AC 



Calibrator, verify the 34SSA ac voltmeter ac- 
curacy for each Test Frequency, Input Level 
and 3455A Range listed in Table 4-4. The 
3455A display readings should be within the 
Test Limits given in the table. 

2. 34SSA Option 001: Using the AC Calibrator, 
verify the 345SA ac voltmeter accuracy for each 
Test Frequency (ACV), Input Level and 3455A 
Range listed in Table 4-6. The 34SSA display 
readings should be within the Test Limits given 
in the table. 

f. Set the 3455A FUNCTION to FAST ACV. 

g. 1. Standard Mode) 34SSA: Using the AC 

Calibrator, verify the 3455A ac voltmeter ac- 
curacy (Fast ACV) for each Test Frequency 
above 10 kHz, each Input Level and 345SA 
Range listed in Table 4-4. The 3455A display 
readings should be within the Test Limits given 
in the table. 

2. 34S5A Option 001: Using the AC Calibrator, 



4-6 






Model 3455A 



Section IV 



Table 4-4. AC Accuracy Tast 30 Hz to 100 kHz (Standard Model 3455A only). 



Test 

Frequency 


Input 

Level 


34S6A 

Range 


24 Hour** 
Test Limits 


90 Day** 
Test Limits 


30 Hz* 


1 V 


1 V 


0.99920 to 1.00080 


0.99900 to 1.00100 


100 kHz 


1 V 


1 V 


0.99S20 to 1.00480 


0.99400 to 1.00600 


30 Hz* 


5V 


10 V 


4 9940 to 5.0060 


4.9925 to 5.0076 


100 kHz 


5V 


10 V 


4.9720 to S.0280 


4.9650 to 5.0350 


30 Hz* 


10 V 


10 V 


9.9920 to 10.0080 


9.9900 to 10.0100 


20 kHz 


10 V 


10 V 


9.9920 to 10.0080 


9.9900 to 10.0100 


100 kHz 


10 V 


10 V 


9.9520 to 10.0480 


9.9400 to 10.0600 


30 Hz* 


100 V 


100 V 


99.920 to 100.080 


99.900 to 100.100 


100 kHz 


100 V 


100 V 


99.520 to 100.480 


99.400 to 100.600 


30 Hz* 


1000 V 


1000 V 


998.00 to 1002.00 


997.50 to 1002.50 


10 kHz 


1000 V 


1000 V 


998.00 to 1002.00 


997.50to 1002.60 



* Fraquenciet below 300 Hz apply to ACV Function only. 

* 'These test limits do not Include the temperature coefdcients that must be edded if 
the Instrument is operated outside of the temperature ranpe over which the 24- 
hour or 90-dav specifications apply (see Table 1-1). Derive 6-month test limits 
from AC Accuracy specifications listed in Table 1-1. 



verify the 3455A ac voltmeter accuracy for each 
Test Frequency {Fast ACV), Input Level and 
3455A Range listed in Table 4-6. The 3455A 
display readings should be within the Test 
Limits given in the table. 

h. Set the AC Calibrator for an output of 1 V, 10 
kHz. Set the 3455A FUNCTION to ACV and RANGE 
to 1 V. 

i. Record the 3455A reading:. . V. 

j. Set the 3455A FUNCTION to FAST ACV. Record 
the 3435A reading: . . V. 

k. Set the 3455A FUNCTION to ACV and RANGE 
to 10 V. Set the AC Calibrator for an output of 5 V, 10 
kHz. 

l. Record the 34S5A reading:. . V. 

m. Set the 3455A FUNCTION to FAST ACV. 
Record the 3455A reading: . . V. 

n. Disconnect the AC Calibrator from the 34SSA. Set 
the 3455A FUNCTION to ACV and RANGE to 1 V. 

0 . Set the Test Oscillator for an output of 1 V, 10 
kHz. Connect the SO-ohm output of the Test Oscillator, 



terminated in a 50 ohm load, to the 34SSA front panel 
INPUT. 

p. Adjust the Test Oscillator level controls for a 
3455A reading as close as possible to the reading record- 
ed in Step i. Set the Test Oscillator’s meter switch to ex- 
panded scale and adjust the meter reference controls for 
a zero reading on the Test Oscillator’s meter. Use the 
Test Oscillator’s level controls to maintain this zero 
reading whenever the Test Oscillator frequency is 
varied. 

q. 1. Standard Model 3455 A: Set the Test Oscillator 

to 1 MHz (maintain reference level on meter of 
Test Oscillator). The 3455A display reading 
should be within the Test Limits given in Table 
4-5. 

2. 3455A Option 001: Set the Test Oscillator fre- 
quency to 250 kHz (maintain reference level on 
meter of Test Oscillator). The 3455A display 
reading should be between 0.99240 V and 
1.00760 V (24-hour spec.) or between 0.99190 V 
and 1.00810 V (90-day spec.). 

r. Set the 3455A FUNCTION to FAST ACV. Set the 
Test Oscillator frequency to 10 kHz and adjust its out- 
put level for the 3455A reading recorded in step j. Ad- 
just the meter reference controls for a zero reading on 



Table 4-5. AC Accuracy Teete 100 kHz to 1 MHz IStandard Model 345SA only). 



Test 

Frequency 


Input 

Level 


3455A 

Range 


24 Hour* 
Test Limits 


90 Day* 
Test Limits 


1 MHz 


1 V 


1 V 


0.92400 to 1.07600 


0.90900 to 1.09100 


1 MHz 


5V 


10 V 


4.4900 to 5.5100 


4J900 to 5.6100 


350 kHz 


5V 


10 V 


4.7600 to 5.2400 


4.70IX) to 5.3000 



*Thes« lest limits do not include the temperature coefficients that must be added if 
the instrument is operated outside of the temperature range over which the 24-hour 
or 90-day specifications apply (see Table 1-11. Derive 6-month test limits from AC 
Accuracy specifications listed in Table 1-1 . 



4-7 




Section IV 



Model 3455A 



Table 4-6. AC Accuracy Test 30 Hz te 100 kHz (34SSA Option 001 onlyl. 



Frequency 

(ACV) 


Frequency 
(FAST ACV) 


Input 

Level 


345SA 

Range 


24 Hour' 
Test Limits 


90 Day' 
Tast Limits 


30 


300 Hz 


1 V 


1 V 


0 99460 to 1.00540 


0.99430 to 1 00570 


60 Hz 


500 Hz 


1 V 


1 V 


0.99630 to 1.00370 


0 99600 to 1.00400 


250 kHz 


250 kHz 


1 V 


1 V 


0 99240 to 1.00760 


0.99190 to 1.00810 


30 Hz 


300 Hz 


5V 


10 V 


4.969510 5.0305 


4.9680 to 5.0320 


100 kHz 


100 kHz 


5V 


10 V 


4.9930 to 5 0070 


4 9925 to 5.0075 


250 kHz 


250 kHz 


5V 


10 V 


4 9590 to 5.0410 


4.9565 to 5.0436 


30 Hz 


300 Hz 


10 V 


10 V 


9 9460 to 10.0540 


9.9430 to 10.0570 


100 Hz 


1 kHz 


10 V 


10 V 


9 9886 to 10.0115 


9.9875 to 10.0125 


100 kHz 


100 kHz 


10 V 


10 V 


99885 to 10.0115 


9.987S to 10.0125 


30 Hz 


300 Hz 


100 V 


100 V 


99 460 to 100.540 


99.430 to 100.570 


100 kHz 


100 kHz 


100 V 


100 V 


99 885 to 100.115 


99.87510 100.126 


30 Hz 


300 Hz 


1000 V 


lOOOV 


994.60 to 1005.40 


994.30 to 1005.70 


10 kHz 


10 kHz 


1000 V 


1000 V 


998.75 to 1001.25 


998 65 to 1001 .35 



'These (est limits do not include the lemperaiuri coefficients that must be added if the instru- 
ment is operated outside of the temperature range over which the 24 hour or 90-day specifi- 
cations apply (see Table 1-11. Derive 6-month test limits from AC Accuracy specifications 
listed in Table T1 



the meter of the Test Oscillator and use control to main- 
tain this reading whenever the frequency is varied. 

s. Repeat step q. 

t. Set the 3455A FUNCTION to ACV and RANGE 
to 10 V. Remove the 50-ohm termination from the Test 
Oscillator’s output. Connect the 50-ohm output of the 
Test Oscillator (unterminated) to the 3455A front panel 
INPUT. Set the Test Oscillator frequency to 10 kHz and 
adjust its level controls for the 5 volt 3455A reading 
recorded in step 1. Adjust the meter reference controls 
for a zero reading on the meter of the Test Oscillator 
and use the level controls to maintain this reading 
whenever the frequency is varied. 

u. I. Standard Model 3455A: Set the Test Oscillator 

to each of the last two Test Frequencies listed in 
Table 4-5 (maintain reference level on meter of 
Test Oscillator). At each frequency setting, (he 
3455A reading should be within the Test Limits 
given in the table. 

2. 345SA Option 001. Set the Test Oscillator fre- 
quency to 250 kHz (maintain reference level on 
meter of Test Oscillator). The 3455A display 
reading should be between 4.9590 V and 5.0410 
V (24-hour spec.) or between 4.9565 V and 
5.0435 V (90-day spec.). 

v. Set the 3455A FUNCTION to FAST ACV. Set the 
Test Oscillator frequency to 10 kHz and adjust its level 
controls for the 5 V 3455A reading recorded in step m. 
Adjust the meter reference controls for a zero reading 
on the meter of the Test Oscillator and use the level con- 
trols to maintain this reading whenever the frequency is 
varied. 

w. Repeat step u. 



Table 4-7. Two-Wira Ohm Accuracy TasL 





Test Limets 
(High Ree. Onl 


Decade 

Resaloi 


34S5A 

Range 


24 Hour* 


90 Day ' 




100 


99.9971 to 100.0029 


99 9995 to 100.0045 



•These test limits do not include the temperature coefficients 
that must be added if the instrument it operated outside of the 
temperature rar>ge over v^ich the 24-hour or 90-day speciflca- 
tiorts apply (see Table 1-1). Derive 6-month test limits from 
Ohms Accuracy specifications listed In Table 1-1 . 

X. This completes the AC Voltmeter Accuracy Test. 
Disconnect the Test Oscillator from the 3455A. 

4-35. Ohmmatar Accuracy Tast 

4-36. This test requires a ca/ibraret/ decade resistor with 
settings that range from 100 ohms to 10 megohms. The 
correction factors indicated on the decade resistor’s 
calibration chart must be algebraically added to the 
345SA display readings to achieve the required test ac- 
curacy. 

4-37. Tast Pracadura. 

Equipment Required; 

Decade Resistor (calibrated General Radio 
Model I433Z) 

a. Set the 3455A controls as follows: 

FUNCTION 2 WIRE K OHM 

RANGE 100 

HIGH RESOLUTION ON 

GUARD ON 



4-8 













Model 3455A 



Seclion JV 



Table 4-B. Foar-Wira Ohm Accuracy Teat 



Decade 

Resistor 


34S5A 

Range 


icon 


0.1 


1 kQ 


1 


10 kO 


10 


100 kU 


100 


1 MO 


1 K 


10 MO 


10 K 



I A) 

Test Limits 
(High R«s. Off) 



(Bl 

Test Limits 
(High Res. On) 



34 Hour* 



90 Day’ 



34 Hour* 



90 Day* 



0.099993 to 0.100007 



0.099990 to 0.100010 



0.999971 to 1.000039 
9.99951 TO 10.00049 
99.9975 to 100.0035 
999.876 to 1000.124 
9989.96 to 10010.04 



0.999960 to 1.000040 
9.99935 to 10.00065 
99.9959 to 100.0041 
999.860 to 1000.140 
9989 95 to 10010.05 



’These test limits do not include the temperature coefficients that mutt be added if the instrument is operated outside of 
the temperature range over mhich the 24-hour or 90-day specifications apply (tee Table 1-1). Derive 6-month test limits 
fromOhms Accuracy specifications listed in Table 1-1 . 



b. Using a shielded cable equipped with banana-plug 
connectors, connect the Decade Resistor to the INPUT 
of the 345SA. Set the Decade Resistor to 100 K ohms. 

c. Algebraically add the Decade Resistor's correction 
factor to the 3455A reading. The algebraic sum should 
be within the test Limits given in Table 4-7, verifying the 
34S5A 2-wire ohms accuracy. 

d. Set the 34S5A controls as follows: 

FUNCTION 4 WIRE K OHM 

RANGE 0.1 

HIGH RESOLUTION OFF 

e. Set the Decade Resistor to 100 ohms. Connect a 
shielded cable, equipped with banana-plug connectors, 
between the 34SSA OHM SIGNAL output and the input 
of the Decade Resistor. {Leave the other cable con- 
nected between the 345SA INPUT and the input of the 
Decade Resistor). 

f. Algebraically add the Decade Resistor’s correction 
factor to the 345SA reading. The algebraic sum should 
be within the Test Limits given in Table 4-8 (A), verify- 
ing the 3455A 4-wire ohms accuracy with High Resolu- 
tion off. 

g. Set the 34SSA RANGE to 1 and HIGH RESOLU- 
TION to ON. Set the Decade Resistor to 1,000 ohms. 

h. Algebraically add the Decade Resistor’s correction 
factor to the 3455A reading. The algebraic sum should 
be within the Test Limits given in Table 4-8(B), verify- 
ing the 345SA 4-wire ohms accuracy with High Resolu- 
tion on. 

i. Repeat Step h for each additional Decade Resistor 
setting and 34SSA Range listed in Table 4-8 (B). 

4-38. DC VOLTMETER INPUT RESISTANCE TEST. 



DC Standard Systron Donner Model MI06A 
Resistor (1 MO ± 0.01<!’'o 1/4 W -hp- part 
number 0811-0202) 

a. Connect the low output of the DC Standard to the 
Low Input terminal of the 34SSA. Using short clip leads 
insert the 1 megohm resistor in series between the DC 
Standard's high output and the High INPUT terminal 
of the 34SSA. Connect a clip lead across the resistor. 

b. Set the 3455A controls as follows: 



FUNCTION DCV 

RANGE 10 V 

HIGH RESOLUTION ON 

GUARD ON 



c. Adjust the DC Standard for a 34SSA reading of 
+ 10.00000 V. 

d. Remove the clip lead from across the I megohm 
resistor. 

e. The 3455A reading should be between 9.9S>900 V 
and 10.00000 V, verifying that the input resistance is 
greater than 10*^ ohms. 

f. Set the 3455A RANGE to 100 V; AUTO-CAL off. 
Reconnect the clip lead across the 1 megohm resistor. 

g. Adjust the DC Standard for a 34SSA reading of 
+ 10.00000 V. 

h. Remove the clip lead from across the 1 megohm 
resistor. 

i. The 3455A reading should be between + 9.0900 V 
and + 9.0917 V, verifying that the input resistance is 10 
megohms ± O.l^o. 

4 39 PERFORMANCE TEST. 



Equipment Required: 



4-40. DC VOLTMETER ACCURACY TEST. 



4-9 















Section IV 



Model .1455A 



4-41. The DC Transfer Standard required for the 
following test must be calibrated to a 1. 017 V to 1.019 V 
standard cell that has been calibrated by the National 
Bureau of Standards (NBS). If the 3435A is to be tested 
for its 24-hour accuracy specifications, the Transfer 
Standard must be adjusted for optimum 1-volt and 
10-volt output accuracy using NBS-calibrated stan- 
dards. It is recommended that the Transfer Standard be 
calibrated and adjusted just prior to use. After calibra- 
tion, it should be left on and. if possible, kept in a con- 
trolled environment where the ambient temperature is 
within one or two degrees of the temperature in which it 
was calibrated. The following procedure should be per- 
formed in that same environment. 

4-42. If the recommended DC Transfer Standard or its 
equivalent is not available, an NBS-calibrated standard 
cell (1.017 V to 1.019 V) can be substituted. If this is 
done, check the full-scale accuracy of the 34S5A 1 V and 
10 V ranges using the Reference Divider recommended 
in the procedue. 

443. Test Proeadurt. 

Equipment Required: 

Reference Divider (Fluke Model 7S0A) 

DC Transfer Standard (Fluke Model 731A) 

DC Standard (Systron Donner Model M106A) 
DC Null Voltmeter (-hp- Model 419A) 

a. Set the 34S5A controls as follows: 



FUNCTION DCV 

RANGE 1 V 

HIGH RESOLUTION OFF 

AUTO CAL ON 

GUARD ON 

TRIGGER INTERNAL 



b. Set the DC Transfer Standard for an output of I 
V. Connect the output of the transfer standard to the 
3455A INPUT. 

c. The 3455A reading should be within the test limits 
listed in Table 4-9, verifying its 1-volt full-scale accuracy 
with High Resolution off. 



Tabla 4-8. DC Accaracy Test (1 V, 10 V Fall-Seala; High 
Ratolutian Off). 



Input 


34SSA 


24 Hour 


90 Oey 


Level 


Renge 


Test Limits 


Limits 


1 V 


1 V 


0.99996 to 1.00004 


0.99993 to 1.00007 


10 V 


10 V 


9.9997 to 10.0003 


9.9994 to 10.0006 



d. Set the 3455A HIGH RESOLUTION to ON. The 
345SA reading should be within the test limits listed in 
Table 4-10, verifying its 1-volt full scale accuracy with 
High Resolution on. 



e. Set the 3455A RANGE to 10 V. Set the Transfer 
Standard for an output of 10 V. The 345SA reading 
should be within the test limits listed in Table 4-10, veri- 
fying its 10-volt full scale accuracy with High Resolu- 
tion on. 



Table 410. DC Aearaey Teat (1 V. 10 V Full Stale; High 
Retalulian On). 



.evel 


Renge 


24 Hour 
Test Limits 


90 Dsy 
Test Limits 


1 V 
10 V 


1 V 
lOV 


0.999966 to 1.000034 
9.99977 to 10.00023 


0.999936 to 1.000064 
9.99947 to 10.00063 



f. Set the 3455A HIGH RESOLUTION to OFF. The 
34SSA reading should be within test limits listed in 
Table 4-9, verifying its 10-volt full scale accuracy with 
High Resolution off. 

g. Set the Transfer Standard for an output of 1 V and 
set the 3455A RANGE to 1 V. Set the 3455A GUARD 
to OFF; connect the 34SSA GUARD terminal to the 
High INPUT terminal. 

h. Reverse the 34SSA INPUT connection to obtain a 
negative 1 V reading. Repeat Steps c through f to verify 
the I V and 10 V full-scale accuracy for negative 
readings. 

i. Disconnect the Transfer Standard from the 345SA 
INPUT. Disconnect the GUARD terminal from the 
High INPUT terminal and set the GUARD to ON. 

j. Using short pieces of number 20 AWG (or thinner) 
insulated solid copper wire, connect the Transfer Stan- 
dard and DC Null Voltmeter to the Reference Divider as 
shown in Figure 44. 

k. Turn off the DC Standard’s output. Using 24” (or 
shorter) shielded cables equipped with banana-plug con- 
nectors, connect the DC Standard and the 34S5A to the 
Reference Divider as shown in Figure 44. 

l. Set the Standard Cell Voltage controls on the 
Reference Divider to correspond to the calibrated 
standard-cell setting on the Transfer Standard. Set the 
Transfer Standard to output the calibrated standard-cell 
voltage. 

m. Zero the DC Null Voltmeter on its 3 microvolt 
range and then set it to the 300 microvolt range. 

n. Set the Reference Divider’s Input Voltage switch 
to 10(X) V and center its course and fine adjustment con- 
trols. Set the Reference Divider’s Output Voltage switch 
to 1000 V. 



o. Set the 34SSA controls as follows: 



4-10 





Model 3455A 



Section IV 




FUNCTION DCV 

RANGE I kV 

HIGH RESOLUTION OFF 

GUARD ON 



CAUTION 

The dc standard's output should be turned 
on and the voltage adjusted by upranging or 
downranging the standard whenever the 
standard’s output needs to be changed. If a 
3455A input voltage greater than 100 V is 
needed, the following procedure should 
always be followed. 

p. Turn the dc standard’s output on and by the fol 
lowing method adjust the standard for an output of 
+ 1000.00 V: 

1. Set the dc standard’s first decade to “0”. 

2. Uprange the dc standard to the 1000 V range. 

3. Increase the standard's first decade so that 1000 
V is reached by increasing the voltage in 100 V 
increments. 

q. Set the Reference Divider's Standard Cell switch 
to the Locked position. Adjust the DC Standard's out- 
put voltage and vernier controls for a zero reading on 
the null meter. 

r. Downrange the Null Meter and adjust the 
Reference Divider’s coarse and fine controls for a null 
indication. Repeat until a null is obtained on the 3 
microvolt range. 



s. Set the Reference Divider's Standard Cell switch to 
Open. Allow ten minutes for the Reference Divider to 
warmup and stabilize. 



Table 4-M. DC Accuracy Tnt (High Resolution Off). 



Divider 

Output 


3455A 

Range 


24 Hour 
Test Limits 


90 Day 
Test Limits 


1000 V' 


1000 V 


999.95 to 1000.05 


999.92 to 1000.08 


500 V 


1000 V 


499.97 to 500.03 


499.96 to 500.04 


100 V 


100 V 


99.995 to 100.005 


99.992 to 100.008 


0.1 V 


0.1 V 


.099992 to 1.00008 


.099989 to .100011 



'For positive raadirt 0 s only. Do not apply negative voltages 
greater than -500 V dc. 



Table 4-12. DC Accuracy Test (High Resolution On). 



II 

Q O 


3455A 

R»ng> 


?4 Houf 
T«R Limit* 


90 0«v 
Tffft Limiti 


1000 V 


1000 V 


S99.9S7 to 1000.043 


999.927 to 1000.073 


SOO V 


1000 V 


499.977 10 600.023 


499962 to 500.038 


lOOV 


1000 V 


99.99310 100.007 


99.990 to 100.010 


100 V 


100 V 


99.9957(0 100.0043 


99.992710 100.0073 


50 V 


100 V 


499977 to 50.0023 


49.9962 to 50.0036 


10 V 


100 V 


99993(0 10.0007 


9.9990 10 10.0010 


5V 


lOV 


4.99987(0 5.00013 


4 99972 10 5.00026 


1 V 


10 V 


0.99995 10 1 .00005 


0.99992(0 1.00008 


05 V 


1 V 


0.499981 to 0.500019 


0.499966 to 0.500034 


0 1 V 


} V 


0 099993lo0 100007 


0.099990 to 0.100010 



'For positive readings only. Oo not apply negative voltages 
greater than - 500 V dc. 



t. Set the Reference Divider’s Standard Cell switch to 
Momentary and, if necessary, readjust the fine control 
for a null indication. Release the Standard Cell switch. 

NOTE 

AUTO-CAL may have to be turned off 



4-11 







Section IV 



Model 3455A 



when making measurements on the 100 V 
and 1000 V ranges. This is only necessary 
when using a DC Standard sensitive to a 
changing load impedance. 

u. The 345SA reading should be within the Test 
Limits given in Table 4-1! (1000 V, 1 kV range), verify- 
ing the full-scale accuracy at + 1000 V with High 
Resolution off. 

V. With the 3455A on the 1 kV range, set the HIGH 
RESOLUTION to ON. 

w. The 34SSA reading should be within the Test 
Limits given in Table 4-12 (1000 V, 1 kV range), verify- 
ing the full scale accuracy at + 1000 V with High 
Resolution on. 

NOTE 

Each time the Reference Divider Output 
Voltage setting is changed, check for null 
and, if necessary, readjust the Reference 
Divider's fine control to obtain a null indica- 
tion. 

Always downrange the Reference Divider 
before downranging the 3455 A. When 
upranging, always uprange the 3455 A before 
upranging the Reference Divider. 

X. Set the DC Standard for an output of + 500 V. 

y. Set the Reference Dividers Input Voltage switch to 
SOO V and center the course and fine adjustment con- 
trols. Set the Reference Dividers Output Voltage switch 
to 500 V. 

z. Adjust the DC Standard and Reference divider as 
outlined in Steps q through t. 

aa. Set the Reference Divider's Output Voltage and 
3455A RANGE to each setting (500 V and below) listed 
in Table 4-12. At each setting, the 34S5A reading should 
be within the Test Limits given in the table. (Be sure to 
maintain null when the Reference Divider's output is 
changed.) 

bb. Set the 3455A RANGE to 1 kV and set HIGH 
RESOLUTION to OFF. 

cc. Set the Reference Divider’s Output Voltage and 
3455A RANGE to each setting (500 V and below) listed 
in Table 4-1 1 . At each setting, the 3455 A reading should 
be within the Test Limits given in the table. (Be sure to 
maintain null when the Reference Dividers output is 
changed.) 



fcMmONl 

In the following tests for negative readings, 
the input to the 3455 A must not exceed -500 
V dc due to the ± 500 V guard to chassis 
limitation. 

dd. Downrange the dc standard to 1 V output and 
turn off the dc standard's output. Reverse the polarity 
of the 3455A INPUT connection to obtain negative 
readings. 

ee. Set the 3455A RANGE to 1 kV and HIGH 
RESOLUTION to ON. Set the Reference Divider Out- 
put Voltage switch to 500 V, turn the dc standard’s out- 
put back on, and uprange to SOO V. 

ff. Repeat Steps aa through cc to verify the negative 
dc accuracy for all settings 500 V and lower. Again, do 
not apply more than -500 V dc to the 3455A INPUT. 

4-44. AC Voltmitar Accuracy TasL 

4-45. The 34S5A ac voltmeter accuracy can be verified 
for frequencies up to 100 kHz on all voltage ranges us- 
ing an AC Calibrator such as the -hp- Model 
745A/746A. To minimize measurement uncertainties 
for frequencies below SO Hz and above 20 kHz, the AC 
Calibrator should be calibrated and its error measure- 
ment control should be used to adjust out the errors in- 
dicated on the calibration chart. For example, if the 
calibration chart indicates that the 745A output is 
0.04Vo high at 1 V, 50 kHz, set the 745A error measure- 
ment control to + 0.04i% to obtain a precise 1 V output. 
The 745A/746A can be calibrated during a routine per- 
formance test using the procedures outlined in the 
745A/746A Operating and Service Manuals. Calibra- 
tion charts for these instruments are normally valid for 
at least 30 days. 

4-46. A Test Oscillator such as the -hp- Model 652A can 
be used to verify the ac voltmeter accuracy of the 3455A 
for frequencies above 100 kHz (specified for 1 V and 10 
V ranges only). The required accuracy can be obtained 
by adjusting the Test Oscillator output so that the 
3455A reading at 10 kHz is the same as the reading ob- 
tained with the highly accurate AC Calibrator. This 
reference level can then be maintained to within ± 
0.25<7t over the 100 kHz to 1 MHz range using the 
expanded-scale meter on the Test Oscillator. If higher 
accuracy is desired, an ac-to-dc thermal transfer techni- 
que (Figure 4-5) can be used. 

4-47. Test Procedure. 

Equipment Required: 

AC Calibrator (-hp- Model 745A/746A) 

Test Oscillator (-hp- Model 652A) 



4-12 




Section IV 



Model 34S5A 



TEST OSCILLATOR DIGITAL VOLTMETER 







PROCEDURE: 

Appiv accurate dc voltage II V or 3 V) from OC Standard to 
Thermal Converter and adjust DC Differential Voltmeter for 
null. Disconnect the DC Standard and apply the Test Oscillator 
output to both the Thermal Converter and the 3455A. Ad)ust 
the Test Oscillator output level for a null indication on the OC 
Differential Volirrteter. This makes the rms value of the ac input 
to the 3455A equal to the highly accurate output of the DC 
Standard. Repeat this procedure each time the Test Oscillator 
frequency is changed. 



Fioura 4-5. AC/OC Thaniial Trtmftr MuturtMitt (Altarnat* Frgqueficy ResponM Tmi). 



a. Set the 34SSA controls as follows; 



FUNCTION ACV 

RANGE I V 

GUARD ON 

INPUT SELECT FRONT 



b. Set the AC Calibrator for an output of 1 V, 30 Hz 
(74SA 1 V range). Set the AC Calibrator’s error 
measurement control to offset the 1 V, 30 Hz error in- 
dicated on the calibration chart (745A 0.1 error range). 

c. Connect the output of the AC Calibrator to the 
3455A front panel INPUT. 

d. 1. Standard Model 3455A: The3455A 1 V,30Hz 

reading should be within the Test Limits listed 
in Table 4-13. 

2. 3455A Option 001: The 3455A 1 V. 30 Hz 
(ACV) reading should be within the Test Limits 
listed in Table 4-IS. 



e. 1. Standard Model 34SSA: Using the AC 

Calibrator, verify the 34SSA ac voltmeter ac- 
curacy for each Test Frequency, Input Level 
and 3455A Range listed in Table ^13. The 
345SA display readings should be within the 
Test Limits given in the table. 

2. 3455A Option 001: Using the AC Calibrator, 
verify the 345SA ac voltmeter accuracy for each 
Test Frequency (ACV), Input Level and 3455A 
Range listed in Table 4-15. The 345SA display 
readings should be within the Test Limits given 
in the table. 

f. Set the 3455A FUNCTION to FAST ACV. 

g. 1. Standard Model 3455A: Using the AC 

Calibrator, verify the 3455A ac voltmeter ac- 
curacy (Fast ACV) for each Test Frequency 
above 100 Hz, each Input Level and 34S5A 
Range listed in Table 4-13. The 345SA display 
readings should be within the Test Limits given 



4-13 






Section IV 



Model 3455A 



ratals 4-13. AC Accuracy Taat 30 Hi to 100 kHi (Standard Modal 34SSA only). 



Test 

Frequency 


Input 

Level 


345SA 

Range 


24 Hour** 
Test Limits 


90 Day** 
Test Limits 


30 Hz* 


1 V 


1 V 


0.99920 to 1.00080 


0 99900 to 1.00100 


300 Hz 


1 V 


t V 










to kHz 


1 V 


1 V 










20 kHz 


1 V 


1 V 










50 kHz 


1 V 


1 V 


0.99520 to 1.00480 


0.99400 to 1.00600 


too kHz 


1 V 


1 V 










30 Hz* 


5V 


10 V 


4.9940 to 


5.0060 


4.9925 to 


5.0075 


300 Hz 


5V 


10 V 










20 kHz 


5V 


10 V 










too kHz 


5V 


10 V 


4.9720 to 


5.0280 


4.9650 to 


5.0350 


30 Hz* 


10 V 


10 V 


9^920 to 


10.0080 


9.9900 to 


10.0100 


60 Hz* 


10 V 


10 V 










too Hz* 


10 V 


10 V 










500 Hz 


10 V 


10 V 










t kHz 


10 V 


lOV 










5 kHz 


to V 


10 V 










to kHz 


10 V 


10V 










20 kHz 


tov 


10V 










50 kHz 


10 V 


10 V 


9.9520 to 10.0480 


9.9400 to 


10.0600 


too kHz 


10 V 


10 V 










30 Hz* 


toov 


100 V 


99.920 to 100.080 


99.900 to 


100.100 


300 Hz 


100 V 


100 V 










to kHz 


100V 


100 V 










20 kHz 


too V 


100 V 










too kHz 


100 V 


100 V 


99.52010 100.480 


99.400 to 100.600 


30 Hz* 


1000 V 


1000 V 


998.00 to 1002.00 


997.50 to 


1002.50 


300 Hz 


1000 V 


1000 V 










10 kHz 


1000 V 


1000 V 











* Frequencies below 300 Hz apply to ACV Function only. 

**Tbese test limits do not include the temperature coefficients that must be added 
if the instrurrtent is operated outside of the temperature range over vvhich the 
24-hour or 90-day specifications apply (see Table 1-1). Derive 6-month test 
limits from AC Accuracy specifications listed in Table 1 -1 . 



in the table. 

2 . 3455A Option 001: Using the AC Calibrator, 
verify the 3455A ac voltmeter accuracy for each 
Test Frequency (Fast ACV), Input Level and 
3455A Range listed in Table 4-15- The 3455A 
display readings should be within the Test 
Limits given in the table. 

h. Set the AC Calibrator for an output of 1 V, 10 
khz. Set the 3455A FUNCTION to ACV and RANGE 
to 1 V. 



0 . Set the Test Oscillator for an output of 1 V, 10 
kHz. Connect the 50-ohm output of the Test Oscillator, 
terminated in a 50-ohm load, to the 3455A front panel 
INPUT. 

p. Adjust the Test Oscillator level controls for a 34S5A 
reading as close as possible to the reading recorded in 
Step i. Set the Test Oscillator’s meter switch to expand- 
ed scale and adjust the meter reference controls for a 
zero reading on the Test Oscillator’s meter. Use the Test 
Oscillator’s level controls to maintain this zero reading 
whenever the Test Oscillator frequency is varied. 



i. Record the 3455A reading; V. 

j. Set the 3455A FUNCTION to FAST ACV. Record 

the 3455A reading: V. 

k. Set the 3455A FUNCTION to ACV and RANGE 
to 10 V. Set the AC Calibrator for an output of 6 V, 10 
kHz. 

1 .Record the 3455A reading: V. 

m. Set the 3455A FUNCTION to FAST ACV. 

Record the 3455A reading: V. 

n. Disconnect the AC Calibrator from the 3455A. Set 
the 3455A FUNCTION to ACV and RANGE to 1 V. 



q. 1. Standard Model 3455A: Set the Test Oscillator 

to each of the first four Test Frequencies listed 
in Table 4-14 (maintain reference level on meter 
of Test Oscillator). At each frequency setting, 
the 34S5A display reading should be within the 
Test Limits given in the table. 

2 . 3455A Option 001; Set the Test Oscillator fre- 
quency to 250 kHz (maintain reference level on 
meter of Test Oscillator). The 3455A display 
reading should be between 0.99240 V and 

1.00760V (24-hour spec.) or between 0.99190 V 
and 1.00810 V (90-day spec.). 

r. Set the 3455A FUNCTION to FAST ACV. Set the 
Test Oscillator frequency to 10 kHz and adjust its out- 



4-14 





Section [V 



MoJel .1455A 



Table 4-14. AC Accuracy Tact 100 hHc ta 1 MHi IStaadard Modal 34SSA aniy). 



Test 

Frequency 


Input 

Level 


34S5A 

Range 


24 Hour* 
Test Limits 


90 Day’ 
Test Limits 


110 kHz 


1 V 


1 V 


0.98000 to 1.02000 


0.97750 to 1.02250 


250 kHz 


1 V 


1 V 


1 


1 


500 kHz 


1 V 


1 V 


0.95600 to 1.04400 


0.94500 to 1 .05500 


1 MHz 


1 V 


1 V 


0.92400 to 1.07600 


0.92000 to 1.08000 


no kHz 


6V 


10 V 


5.8720 to 6.1280 


5.8550 to 6.1450 


250 kHz 


6V 


10 V 


1 


1 


500 kHz 


6 V 


10 V 


5.7200 to 6.2800 


5.6500 to 6.3600 


1 MHz 


6V 


10 V 


5.5500 to 6.4500 


5.4400 to 6.5600 



’These test limits do not include the temperature coefficients that must be 
added if the instrument is operated outside of the temperature range over 
which the 24-hour or 90-dav specifications apply Isee Table 1-1). Derive 
6-month test limits from AC Accuracy specifications listed in Table 
1 - 1 . 



put level for the 34S5A reading recorded in Step j. Ad- 
just meter reference controls for a zero reading on the 
meter of the Test Oscillator and use the level control to 
maintain this reading whenever the frequency is varied. 

s. Repeat Step q. 

t. Set the 3455A FUNCTION to ACV and RANGE 
to 10 V. Remove the SO-ohm termination from the Test 
Oscillator’s output. Connect the SO-ohm output of the 
Test Oscillator (unterminated) to the 34S3A front panel 
INPUT. Set the Test Oscillator frequency to 10 kHz and 



adjust its level controls for the 6 V 34SSA reading 
recorded in Step 1. Adjust the meter reference controls 
for a zero reading on the meter of the Test Oscillator 
and use the level controls to maintain this reading 
whenever the frequency is varied. 

u. 1 . Standard Model 34SSA: Set the Test Oscillator 
to each of the second four Test Frequencies 
listed in Table 4-6 (maintain reference level on 
meter of Test Oscillator). At each - frequency 
setting, the 34SSA reading should be within the 
Test Limits given in the table. 



Table 4-1S. AC Aecuracy Test 30 Hz to 100 hHz (34SSA Option 001 only). 



Frequency 

(ACV) 


Freq uency 
(FAST ACVl 


Input 

Level 


3455A 

Range 


24 Hour’ 
Test Limits 


90 Day* 
Test Limits 


30 Hz 


300 Hz 


1 V 


1 V 


0.99460 to 1.00540 


0.99430 to 1.00570 


50 Hz 


500 Hz 


1 V 


1 V 


0.99630 to 1.00370 


0.99600 to 1.00400 


100 Hz 


1 kHz 


1 V 


1 V 


0.99885 tol.00115 


0.99875 


0 1.00125 


10 kHz 


10 kHz 


1 V 


1 V 










SO kHz 


50 kHz 


1 V 


1 V 










100 kHz 


100 kHz 


1 V 


1 V 










30 Hz 


300 Hz 


5V 


10 V 


4^695 to 5.0305 


4.9680 to 5.0320 


50 Hz 


500 Hz 


5 V 


10 V 


4.9790 to 5.0210 


4.9775 to 5.0225 


100 Hz 


1 kHz 


5V 


10 V 


4.9930 to 5.0070 


4.9925 to 5.0075 


10 kHz 


10 kHz 


6V 


10 V 










50 kHz 


50 kHz 


5V 


10 V 










100 kHz 


100 kHz 


5 V 


10 V 










30 Hz 


300 Hz 


10 V 


10 V 


9.9460 to 10.0540 


9.9430 to 10.0570 


50 Hz 


500 Hz 


10 V 


10 V 


9.9630 to 10.0370 


9.9600 to 10.0400 


100 Hz 


1 kHz 


10 V 


10 V 


9.9885 to 10.0115 


9.9875 to 10.0125 


10 kHz 


10 kHz 


10V 


10 V 










20 kHz 


20 kHz 


10 V 


10 V 










50 kHz 


50 kHz 


10 V 


10 V 










100 kHz 


100 kHz 


10 V 


10 V 










30 Hz 


300 Hz 


100 V 


100 V 


99.460 to 100.540 


99.430 to 100.570 


50 Hz 


500 Hz 


100 V 


100 V 


99.630 to 100.370 


99.600 to 100.400 


100 Hz 


1 kHz 


100 V 


100 V 


99.885 to 100.115 


99.875to 100.125 


10 kHz 


10 kHz 


100 V 


100 V 










50 kHz 


50 kHz 


100 V 


100 V 










100 kHz 


too kHz 


100 V 


100 V 










30 Hz 


300 Hz 


1000 V 


1000 V 


994.60 to 1005.40 


994.30 to 1005.70 


50 Hz 


500 Hz 


1000 V 


1000 V 


996.30 to 1003.70 


996.00 to 1004.00 


100 Hz 


1 kHz 


1000 V 


1000 V 


998.85 to 1001.15 


998.75 to 1001.25 


10 kHz 


10 kHz 


1000 V 


1000 V 


998 75 to 1001.25 


998.65 to 1001.35 



’These test limits do not include the temperature coefficients that must be added if the instrument 
is operated outside of the temperature range over which the 24-hour or 90-day specifications 
apply (see Table 1-1 ). Derive 6-month test limits from Accuracy Specifications listed in 
Table 1-1. 



4-15 





Section IV 



Model 3455A 



Tible 4-1 B. Two-Wire Ohm Acciraey Twt 







(A) 

Test Umit! 
(High Res. 0(f) 


(8) 

Test Limits 
(High Res. On) 


OeMde 

Resiitor 


345SA 

Range 


24 Hour • 


90 Day* 


24 Hour* 


90 Day* 


loon 

t kn 


0.1 

1 


'0.099593 to 0.100407 
0.99956 to 1.00044 


0.099590 toO.100410 
099954 to 1.00046 


0.999571 to 1.000429 


0.999560 to 1 .000440 


10 kn 


10 


9.9989 to 10.0011 


9.9987 to 100013 


9.99911 to 1000089 


9.99895 to 10.00106 


100 kn 


100 


99.996 to 100.004 


99.994 to 100.006 


999971 to 100.0029 


99.9955 to 100.0045 


1 Mn 


1 K 


999.8310 1000.17 


999.81 to 1000.19 


999.876 to 1000.124 


999.860 to 1000.140 


10 Mn 


10 K 


9989.5 to 10010.5 


9989.510 10010.5 


998996 to 1001004 


9989.9510 10010.06 



*Thete teti licniti do not include the tempefeture coefficient! that mutt be added if the intirumeni ii operated 
outilda of the temperature ran9e over which the 24-hour or 90-day specif teat ioni apply (tee Table 1-1). Derive 
6-mortth test limits from Ohmi Accuracy tpeciflcationt listed in Table t-1. 



2. 345SA Option 001. Set the Test Oscillator fre- 
quency to 2S0 kHz (maintain reference level on 
meter of Test Oscillator). The 3455A display 
reading should be between 5.9S20 V and 6.IM80 
V (24-hour spec.) or between 5.9490 V and 
6.0510 V (90-day spec.). 

V. Set the 3455A FUNCTION to FAST ACV. Set the 
Test Oscillator frequency to 10 kHz and adjust its level 
controls for the 6 V 3455A reading recorded in Step m. 
Adjust the meter reference controls for a zero reading 
on the meter of the Test Oscillator and use the level con- 
trols to maintain this reading whenever the frequency is 
varied. 

w. Repeat Step u. 

X. This completes the AC Voltmeter Accuracy test. 
Disconnect the Test Oscillator from the 3455A. 

4-48. Ohmmeter Accuracy Tnt 

4-49. This test requires a calibrated decade resistor with 
settings that range from 100 ohms to 10 megohms. The 
correction factors indicated on the decade resistor’s 
calibration chart must be algebraically added to the 
3455A display readings to achieve the required test ac- 
curacy. 

4-50. Tut Procedure. 

Equipment Required: 

Decade Resistor (calibrated General Radio 
Model I433Z) 

DC Voltmeter (-hp- Model 4I9A) 

a. Set the 3455A controls as follows: 

FUNCTION 2 WIRE K OHM 

RANGE 0.1 

HIGH RESOLUTION OFF 

GUARD ON 

b. Using a shielded cable equipped with banana-plug 



connectors, connect the Decade Resistor to the INPUT 
of the 3455A. Set the Decade Resistor to 100 ohms. 

c. Algebraically add the Decade Resistor’s correction 
factor to the 3455A reading. The algebraic sum should 
be within the Test Limits given in Table 4-16(A), verify- 
ing the 3455A 2-wire ohms accuracy with High Resolu- 
tion off. 

d. Repeat Step c for each Decade Resistor setting and 
3455A Range listed in Table 4-16. 

e. Set the 3455A RANGE to I and HIGH RESOLU- 
TION to ON. Set the Decade Resistor to 1 ,000 ohms. 

f. Algebraically add the Decade Resistor’s correction 
factor to the 34SSA reading. The algebraic sum should 
be within the Test Limits given in Table 4-16(B), verify 
the 3455A 2-wire ohms accuracy with High Resolution 
on. 

g. Repeat Step f for each additional Decade Resistor 
setting and 3455A Range listed in Table 4-16(A). 

h. Set the 3455A controls as follows: 

FUNCTION 4 WIRE K OHM 

RANGE O.l 

HIGH RESOLUTION OFF 

i. Set the Decade Resistor to 100 ohms. Connect a 
shielded cable, equipped with banana-plug connectors, 
between the 3455A OHM SIGNAL output and the input 
of the Decade Resistor. (Leave the other cable con- 
nected between the 3455A INPUT and the input of the 
Decade Resistor.) 

j. Algebraically add the Decade Resistor’s correction 
factor to the 3455A reading. The algebraic sum should 
be within the Test Limits given in Table 4-1 7(A), verify- 
ing the 3455A 4-wire ohms accuracy with High Reslu- 
tion off. 

k. Repeat Step j for each E)ecade Resistor setting and 
3455A Range listed in Table 4-17(A). 



4-16 





Model 3455A 



Section IV 



TibU 4-17. Four-Wire Ohms Aecurocy Tost 







(A) 

Tew Limiti 
(High Res. OH) 


(B1 

Test Limits 
(High Res. On) 


Decad6 

Resiltor 


3465A 

Rangs 


24 Hour • 


90 Day* 


24 Hour* 


90 Day* 


100 n 
1 kn 


0.1 

1 


0.099993 to 0,100007 
099996 to 1.00004 


0.099990 to 0.100010 
099994 to 1.00006 


0999971 to 1.000029 


0.999960 to 1 .000040 


10 kn 


to 


99993 to 10.0007 


99991 TO 10.0009 


999951 to 10.00049 


9.99935 to 10.00065 


100 kn 


100 


99 .996 to 100.004 


99.994 to 100.006 


99.9975 to 100.0025 


99.9959 to 100.0041 


1 Mil 


1 K 


999.83 to 1000.17 


99991 to 1000.19 


999.076 to 1000.124 


999860 to 1000.140 


10 MO 


10 K 


9989 5 to 10010.5 


9989.5 to 10010.5 


9989.96 to 10010.04 


9989.95 to 10010.05 



*Th»s« teti limits do not include the tempereture coefficients that must be added if the instrument is operated 
outside of the tempereture rertge over which the 24-hour or 90-dav specifications apply (tee Table 1-1 ). Derive 
6-monih test limits from Ohms Accuracy specifications listed in Table 1-1. 



l. Set the 34S5A RANGE to I and HIGH RESOLU- 
TION to ON. Set the Decade Resistor to 1,000 ohms. 

m. Algebraically add the Decade Resistor’s correc- 
tion factor to the 3455A reading. The algebraic sum 
should be within the Test Limits given in Table 4-17(B), 
verifying the 345SA 4-wire ohms accuracy with High 
Resolution on. 

n. Repeat Step I for each additional Decade Resistor 
setting and 3455A Range listed in Table 4-17(B). 

o. Set the 345SA RANGE to 10 K. Set the Decade 
Resistor to 14.99 K. 

p. Using the DC Voltmeter, measure the voltage 
across the Decade Resistor terminals. The voltage 
should be less than 4.7 V dc, verifying the maximum 
output voltage specification for a valid ohms reading. 

q. Disconnect the Decade Resistor. (Leave the 3455A 
OHMS SIGNAL output connected to the INPUT). 

r. Measure the voltage across the 3455A INPUT ter- 
minals. The voltage should be less than S V dc, verifying 
the maximum output voltage specification for an open- 
circuit condition. 

4-51. COMMON MODE AND NORMAL MODE REJECTION TEST. 

4-52. Effective common-mode rejection is the ratio of 
the peak common-mode voltage to the resultant peak er- 
ror in the reading, with a I kilohm imbalance in the Low 
input lead. The formula for calculating effective 
common-mode rejection (ECMR) is: 

ECMR ® ?n lAg Common-Mode Voltage 
Effective on Reading (Volts) 

4-53. Normal-mode rejection is the ratio of the peak ac 
normal-mode voltage to the peak error it introduces in a 
dc voltmeter reading. The formula for calculating 
normal-mode rejection (NMR) is: 



NMR = 20 log Superimposed Voltage 

Effect on Reading (Volts) 

4-54. Tut Pruadurt. 

Equipment Required: 

DC Standard (Systron Donner Model M106A) 
AC Calibrator (-hp- Model 745A) 

Frequency Counter (-hp- Model 5300A) 

Resistor (I kfl ± 10% 1/4 W -hp- Part 
Number 0684-1021) 

Resistor (10 kft ± 10% 1/4 W -hp- Part 
Number 0684-1031) 

a. Connect the 1 K resistor between the 34S5A High 
and Low INPUT terminals. Connect the GUARD ter- 
minal to (he High INPUT terminal. 

b. Set the 345SA controls as follows: 



FUNCTION DCV 

RANGE 1 V 

HIGH RESOLUTION ON 

GUARD OFF 

c. Record the 3455A reading: V. 



d. Connect the DC Standard (output off) between 
the High INPUT terminal and the chassis of the 345SA 
as shown in Figure 4-6. 

e. Set the DC Standard for an output of + 500 V dc. 

f. The 345SA reading should be within 0.00(X}50 V of 
the reading recorded in Step c, verifying that the dc 
common-mode rejection is greater than 140 dB. 

g. This completes the dc common-mode Rejection 
test. Turn off the DC Standard output and disconnect 
the DC Standard from the 3455A. Disconnect the 1 K 
resistor and connect the 10 K resistor across the 345SA 
INPUT terminals (leave GUARD connected to High). 



4-17 




















Model 3455A 



Section IV 




Figare 4-6. DC Common-Mode Rojoctioo Toot 



h. Set (he AC Calibrator for an output of I V. Con- High and Low INPUT terminals, 
nect the Frequency Counter to the output of the AC 

Calibrator and adjust the AC Calibrator’s frequency to o. Set the 3455A RANGE to 10 V and record the 

50 Hz or 60 Hz ± O.IV#, corresponding to the power- display reading: V. 

line frequency being used. 

p. Remove the jumper from the 3455A INPUT ter- 

i. Record the 34S5A reading: V. minals. Connect the AC Calibrator output to the 34S5A 

INPUT. 

j. Disconnect the Frequency Counter and connect the 

AC Calibrator between the High INPUT terminal and q. The 34S5A reading should be within 00.0100 V of 

chassis of the 3455A as shown in Figure 4-7. the reading recorded in Step o, verifying that the 50 Hz 

or 60 Hz normal-mode rejection is greater than 60 dB. 

k. Without disturbing the frequency setting, set the 

AC Calibrator for an output of 70.7 V (100 V peak). r. This completes the Common-Mode and Normal- 

Mode Rejection Tests. Disconnect the AC Calibrator 

1. The 3455A reading should be within 0.000010 V of from the 3455A and disconnect the GUARD from the 

the reading recorded in Step i, verifying that the 50 Hz High INPUT terminal, 

or 60 Hz ac common-mode rejection is greater than 160 
dB. 

4^55. DC VOLTMETER INPUT RESISTANCE TEST. 

m. Without disturbing the frequency setting set the 

AC Calibrator for an output of 7.07 V (10 V peak). Equipment Required: 

Disconnect the AC Calibrator from the 3455A. 

DC Standard (Systron Donner Model M106A) 

n. Remove the 10 K resistor from the 3455A INPUT Resistor (1 MO ± 0.01 1/4 W -hp- Part 

terminals. Connect a short jumper between the 3455A Number 0811-0202) 













Model 3455A 



Section IV 



a. Connect the low output of the DC Standard to the 
Low INPUT terminal of the 3455A. Using short clip 
leads, insert the I megohm resistor in series between the 
DC Standard’s high output and the High INPUT ter- 
minal of the 34S5A. Connect a clip lead across the 
resistor. 

b. Set the 34SSA controls as follows: 



FUNCTION DCV 

RANGE 10 V 

HIGH RESOLUTION ON 

GUARD ON 



c. Adjust the DC Standard for a 3455A reading of 
+ 10.00000 V. 

d. Remove the clip lead from across the I megohm 
resistor. 

e. The 345SA reading should be between 9.99900 V 
and 10.00000 V, verifying that the input resistance is 
greater than 10'() ohms. 

f. Set the 3455A RANGE to 100 V; Auto-Cal OFF. 
Reconnect the clip lead across the I megohm resistor. 

g. Adjust the DC Standard for a 3455A reading of 
+ 10.0000 V. 

h. Remove the clip lead from across the 1 megohm 
resistor. 

i. The 3455A reading should be between + 9.0900 V 
and + 9.0917 V, verifying that the input resistance is 10 
megohms ± O.l'5'o. 

4-56. AC VOLTMETER INPUT IMPEDANCE TEST. 

Equipment Required: 

Test Oscillator (-hp- Model 6S2A) 

Resistor (I MO ± 0.1 Vo -hp- Part Number 
0698-6369) 

Resistor (100 kO O.lVo -hp- Part Number 
0811-1997) 

a. Set the 34S5A controls as follows: 



FUNCTION ACV 

RANGE 1 V 

GUARD ON 

INPUT SELECT (rear panel) .... FRONT 
AUTO-CAL ON 



b. Connect the Test Oscillator 50-ohm output (ter- 
minated in SO-ohm load) to the 34SSA front panel IN- 
PUT. 

c. Set the Test Oscillator frequency to SO Hz and ad- 
just its output level for a 34S5A reading of 1.00000 V. 

d. Using short clip leads, insert the 1 megohm 
resistor in series between the terminated Test Oscillator 
output and the High INPUT terminal of the 3455A. 

e. The 3455A reading should be between 0.66443 V 
and 0.66887 V, verifying that the input resistance is 2 
megohms ± IVo. 

f. Disconnect the resistor and reconnect the Test 
Oscillator output to the 3455A INPUT. 

g. Set the Test Oscillator frequency to 20 kHz and 
adjust its output level fora 34SSA reading of 1. 00000 V. 

h. Using short clip leads, insert the 100 kilohm 
resistor in series between the terminated Test Oscillator 
output and the High INPUT terminal of the 3455A. 

i. The 3455A reading should be greater than 
0.61017 V, verifying that the input shunt capacitance is 
less than 100 pF. 

j. Set the rear panel INPUT SELECT switch to 
REAR. Connect the Test Oscillator 50-ohm output (ter- 
minated in 50-ohm load) to the 3455A rear-panel IN- 
PUT. 

k. Repeat Steps c through i to test the input im- 
pedance at the rear INPUT terminals. In Step i, the 
3455A reading should be greater than 0.70822 V verify- 
ing that the rear terminal input shunt capacitance is less 
than 75 pF. 



4-19/4-20 




OPERATIONAL VERIFICATION TEST CARD 



Hawlatt-Psckard Modal 3455A (Standard) 
Digital Voltmatar 

Sarial No. 



T«*tJ Parfonnad By 
Data 



DC ACCURACY TEST 



Input 

Laval 


3466A 

Range 


High 

Ratoiulion 


3455A 

^tltiva 

Raadirtg 


34S6A 

Nagativa 

Reading 


Tatt Limitt* 


0.1 V 
1 V 
1 V 
6V 
10 V 
10 V 
100 V 
1000 V 


0.1 V 
1 V 
10 V 
10 V 
10 V 
10 V 
100 V 
1000 V 


OFF 

ON 

ON 

ON 

ON 

OFF 

ON 

ON 



















































*Racord 34-hour or 90-day tatt llmha from tabla datignatad in tatt proca- 
dure. Dariva 6-month tatt limitt from tpacificatlont linad in Tabla 1-1. 

**For potitiva raadingi only. Do not apply nagetrva voltagai greater than 
-SOOVdc. 



AC VOLTMETER ACCURACY TEST 30 Hz TO 1 MHz 
(Standard Modal 3455A Only) 



Frtqu«r>cv 


Input 

Laval 


3455A 

Range 


3455A 

Reading 

(ACV) 


34SSA 
Reading 
(FAST ACV) 


Tatt Limitt** 


30 Hz* 


1 V 


1 V 









100 kHz 


1 V 


1 V 








350 kHz 


5V 


10 V 








30 Hz* 


6V 


10 V 








too kHz 


6 V 


10 V 








1 MHz 


1 V 


1 V 








1 MHz 


6V 


10 V 








30 Hz* 


10 V 


10 V 








30 kHz 


10 V 


10 V 








100 kHz 


10 V 


10 V 








30 Hz* 


100 V 


100 V 








100 kHz 


100 V 


100 V 








30 Hz* 


1000 V 


1000 V 








10 kHz 


1000 V 

1 


1000 V 









*ACV Function Only 



"Record 34-hour or 9Dday tatt limitt from tha tabiei datignatad in the 
tatt procadura. Derive 6-month teat limitt from tpacificationi littad In 
Tabla t-t. 



1 




OPERATIONAL VERIFICATION TEST CARD (Cont'd) 



OHMS ACCURACY TEST 



Decade 

Resistor 


3465A 

Range 


Ohms 

Furtction 


Reading | 


Test Limits* 


100 Q 


0.1 


4 Wire 






1 kO 


1 


4 Wire 






10 kO 


10 


4 Wire 






100 kO 


100 


4 Wire 






inn 


100 


2 Wire 






t MU 


1 K 


4 Wire 






10 MU 


10 K 


4 Wire 







*R»cord 24-hour or 90-dsy left limit* from table de*lgnated in teit 
procedure. Derive 6-mondi ie*t limits from tpecification* listed in 
Table 1-1. 



DC VOLTMETER INPUT RESISTANCE TEST 



3455A 

Range 


Test 

Reading 


Test Limits 


10 V 


V 


9.99900 V to 10.00000 V 


100 V 


V 


9.0900 V to 9.0917 V 



2 





OPERATIONAL VERIFICATION TEST CARO 



Hewlett-Packard Model 3455A (Option 001 1 Teat Perlormed 8yi 

Digital Voltmeter Date 

Serial 



DC ACCURACY TEST 



Input 

Level 


345SA 

Range 


High 

Resolution 


345SA 

Positive 

Reading 


345SA 

Negative 

Reading 


Test Limits* 


0.1 V 


0.1 V 


OFF 








1 V 


1 V 


ON 








1 V 


lOV 


ON 








5 V 


10 V 


ON 








10 V 


10 V 


ON 








10 V 


10 V 


OFF 








100 V 


100 V 


ON 








1000 V“ 


1000 V 


ON 









‘Record 24-tiour or 90-day test limite from table desigrtated in test 
procedure- Derive 6-month test limits from specifications listed In 
Table 1-1- 



‘ ‘For positive reading only. Do not apply negative voltages greater 
than -500 V dc. 



AC VOLTMETER ACCURACY TEST (OPTION 001 ONLY) 



Frequeiscy 

(ACVI 


Frequertey 
(FAST ACV) 


Input 

Level 


34S5A 

Range 


3455A 

Reading 

(ACV) 


3455A 
Reading 
(FAST ACV) 


Test Limits‘ 


30 Hz 
60 Hz 
250 kHz 

30 Hz 
100 Hz 
250 kHz 
30 Hz 
100 Hz 
100 kHz 

30 Hz 
100 kHz 

30 Hz 
10 kHz 


300 Hz 
500 Hz 
250 kHz 

300 Hz 
100 kHz 
250 kHz 
300 Hz 
1 kHz 
100 kHz 

300 Hz 
100 kHz 

300 Hz 
10 kHz 


1 V 
1 V 
1 V 

5V 

5V 

5V 

10 V 
10 V 
10 V 

100V 
100 V 

1000 V 
1000 V 


1 V 
1 V 
1 V 

10 V 
10 V 
10 V 

10 V 
10 V 
10 V 

100 V 
100 V 

1000 V 
1000 V 























































































‘Record 24-hour or 90-day test limits from tables designated in the test procedure- Derive &monih 
test limits from specifications listed in Table 1-1. 



1 





OPERATIONAL VERIFICATION TEST CARO (Cont'd). 



OHMS ACCURACY TEST 



Decade 

Ratlitor 


3455A 

Range 


Ohms 

Function 


Reading 


Tait Limits* 


1000 


0.1 


4 Wire 






1 kO 


1 


4 Wire 






10 kO 


10 


4 Wire 






100 kO 


100 


4 Wire 






irtft i»n 


inn 


2 Wire 






1 MO 


1 K 


4 Wire 






10 MO 


10K 


4Wire 







‘Record 34-hour or 90-dty tett llmin from table daeignatad In teti 
procadura. Derive 6-month teet limits from tpecificeiions lilted in 
Teble 1-1. 



DC VOLTMETER INPUT RESISTANCE TEST 



3456A 


Test 




Range 


Reading 


Test Limits 


10 V 


V 


9.99900 V to 10.00000 V 


100 V 


V 


9.0900 V to 9.0917 V 



2 




PERFORMANCE TEST CARO 



Hewlett-Packard Model 34S5A (Standard Model Only) 
Digital Voltmeter 
Serial Mo 



Te»t» Performed 8v . 
Date 



OC ACCURACY TEST (High Reiolution off! 



(nput 

Level 


3455A 

Range 


3455A 

Positive 

Raadiiv) 


34S5A 

Nagetive 

Reading 


Tost Limits* 


1 V 


1 V 








10 V 


10 V 








1000 V** 


1000 V 




— 




600 V 


1000 V 








too V 


100 V 








0.1 V 


0.1 V 









'Record 24-hour or 90-day lett limit! from table detignated m tett procedure. 
Derive 6-month ie$t hmli« from specifications listed in Table 1 -1 . 

* *For positive readings only. Do not apply negative voltages greater than - 500 V dc. 



DC ACCURACY TEST (High Resolution on) 



Input 

Level 


3455A 

Range 


3455A 

Positive 

Reading 


3455A , 
Negative ' 
Reading 


Test Limits* 


1 V 


1 V 








10 V 


10 V 








1000 V** 


1000 V 








500 V 


1000 V 








100 V 


1000 V 








100 V 


100 V 








60 V 


100 V 








10 V 


100 V 








5 V 


10 V 








1 V 


10 V 








0.6 V 


1 V 








0.1 V 


1 V 









'Record 24-hour or 90-day test limits from table designated in test 
procedure. Derive 6-month test limits from specifications listed in 
Table 1-1- 

**Por posJtlw readings only, Do r>ot apply negative voltages greater 
than- 500 Vdc. 



1 




PERFORMANCE TEST CARD (Cont'd) 



AC VOLTMETER ACCURACY TEST 30 H* TO 1 MHi 
(Standard Model 34S5A only) 



Test 

Frequency 


Input 

Level 


34S6A 

Range 


3455A 

Reeding 

(ACVJ 


3455A 
Reading 
(FAST ACV» 


Test Limits** 


30 Hi* 
300 Hi 
lOkHi 
20 kHz 
60 kHz 
100 kHz 


1 V 
1 V 
1 V 
1 V 
1 V 
1 V 


1 V 
1 V 
1 V 
1 V 
1 V 
1 V 




_ - - . , 








































30 Hz* 
300 Hz 
20 kHz 
too kHz 


■ 


10 V 
lOV 
10 V 
10 V 




— 




























30 Hz* 
60 Hz* 
100 Hz* 
600 Hz 
1 kHz 
5 kHz 
10 kHz 
20 kHz 
50 kHz 
100 kHz 


10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 


10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 
10 V 




— . — 






„ 


























































30 Hz* 
300 Hz 
10 kHz 
20 kHz 
10O kHz 


100 V 
100 V 
100 V 
100 V 
100 V 


100 V 
100 V 
lOOV 
100 V 
100 V 






































30 Hz* 
300 Hz 
10 kHz 
110 kHz 
250 kHz 
500 kHz 
1 MHz 


1000 V 
1000 V 
1000 V 
1 V 
1 V 
1 V 
1 V 


1000 V 
1000 V 
1000 V 
1 V 
1 V 
1 V 
1 V 


















































110 kHz 
260 kHz 
500 kHz 
1 MHz 


6V 

6V 

6V 

6V 


10 V 
10 V 
10 V 
10 V 



























•ACV Function Only 

"Record 24-Kour or 90-day test limits from the tables designated in the 
test procedure. Derive 6-rr>onth test limits from specifications listed in 
Table 1-1. 



2 




















PERFORMANCE TEST CARO (Cont'd) 



TWO-WIRE OHMS ACCURACY TEST 







High 


Re*. Off 


1 High Ret. On 


Decade 

Resistor 


3486A 

Range 


Reading 


Tasi Limits' 


Reading 


Test Limits' 


lOOn 


0.1 










1 kf) 


1 










10 kn 


10 










100 kn 


100 










1 Mn 


1 K 










10 Mn 


10 K 











'Record ZA-hour or 9(Mav test limit* from table deiigntted in leti 
procedure. Derive 6-monih te*l limit* from *p*clficaiion* li*ted in 
Table 1-t. 



FOUR-WIRE OHMS ACCURACY TEST 



Decade 

Resistor 


3455A 

Range 


High 

Resdirtg 


Ret. Off 
Test Limh*' 


High 

Reading 


Res. On 
Test Limits* 


100 n 


0.1 










1 kn 


1 










10 kn 


10 










i(x> kn 


100 










I Mn 


1 K 










10 Mn 


10K 











'Record 24-hour or 90-day lett limit* from table designated in ten 
procedure. Derive 6-monih test limit* from ipecificationt listed in 
Table 1-1, 



OHMS VOLTAGE TEST 



Voltage for Valid Reading; V « 4.7 V dc) 

Open-Circuit Voltaee: V t< 5 V del 

COMMON-MODE AND NORMAL-MODE REJECTION TESTS 



Reference 

Step 


Reference 

Reading 


Test 


3455A 1 

Reading 


Test Limit 

(Refailve to Raferertcel 


e. 




OC-CMR 




tO.OOOOSOV 


i. 




AC-CMR 




t 0.000010 V 


0. 




NMR 




1 0.0100 V 



DC VOLTMETER INPUT RESISTANCE TEST 



3456A 


Test 




Range 


Reading 


Test Limits 


10 V 


V 


9S9900 V to 10.00000 V 


100 V 


V 


9.09(X>Vto9X)917V 



AC VOLTMETER INPUT IMPEDANCE TEST 

Front-Terminal Reading (Steps): V (0.66443 V to 0.66887 V) 

Front-Terminal Reading IStao »: V (>0.61017) 

Rear-Tarminal Reading (Step el: (0.66443 V to 0.66867 V) 

Rear- Terminal Reading (Slap k); V (> 0.70832) 



3 







PERFORMANCE TEST CARD 



Hewlett-Packard Model 3455A (Option 001 only) 
Oisitel Voltmeter 

Serial Mn 



Tests Performed By:, 
Date 



DC ACCURACY TEST (High Resolution off) 



Input 

Level 


345SA 

Range 


3466A 

Positive 

Reading 


3466A 

Negative 

Reading 


Test Umits‘ 


1 V 


1 V 








10 V 

1000 V“ 
600 V 


10 V 








1000 V 
1000 V 




^ ^ ^ 










100 V 


100 V 








0.1 V 


0.1 V 









‘Record 34-hour or 90-day test limits from table designated in test procedure. 
Derive 6-month test limits from specifications listed in Table 1-1. 

* *For positive readings only. Do not apply negative voltages greater than - SOO V dc. 



DC ACCURACY TEST (High Resolution on) 



Input 

Level 


345SA 

Range 


34SSA 

Positive 

Reading 


34S5A 

Negative 

Reading 


Test Limits* 


1 V 


1 V 








10 V 

1000 V“ 
500 V 
100 V 


10 V 








1000 V 









1000 V 








1000 V 








100 V 


100 V 








so V 


100 V 








10 V 


100 V 








5V 


10 V 








1 V 


10 V 








0.6 V 


1 V 








0.1 V 


1 V 









‘Record 24-hour or 90-day test limits from table designated in test 
procedure. Derive 6-month test limits from specifications listed in 
Table 1-1. 

“For positive readings only. Do rtot apply negative voltages greater 
than -500 Vdc. 



1 




PERFORMANCE TEST CARD (Cont'd) 



TWO-WIRE OHMS ACCURACY TEST 



Decade 

Resistor 


34SSA 

Range 


High 

Reading 


Ret. Off 
Test Limits* 


High 

Reading 


Res. On 
Test Limits* 


100 n 


0.1 






j 




1 kn 


1 










tokn 


10 










too kn 


100 










t Mn 


1 K 










10 Mn 


10 K 











*R«cord 24-hour or 90-day ia*t limit* from table desisnaiad irt te*t 
procedure. Derive S-mortth lett limits from speclficaiion* listed in 
Table 1-1. 



FOUR-WIRE OHMS ACCURACY TEST 



Decade 

Resistor 


3455A 

Range 


Hl^ 

Reading 


Ret. Off 
Test Limits* 


High 

Reading 


Res. On 
Test Limits* 


100 n 


0.1 










1 kn 


1 










10 kn 


10 










100 kn 


100 










1 Mn 


1 K 










10 Mn 


10 K 











'Record 24-hour or 90-day test limits from table designated In test 
procedure. Derive 6-month test limits from ss>ecifications listed in 
Table 1-1- 



OHMS VOLTAGE TEST 



Voltage for Valid Reading- V « 4.7 V dc) 

Open-Circuit Voltaae: V « 6 V del 

COMMON-MODE AND NORMAL-MODE REJECTION TESTS 



Reference | 
Step 


Reference 

RMding 


Test 


345SA 

Reading 


Test Limit 

(Relative to Referettcel 


c. 




DC-CMR 


1 


1 0.000050 V 


1 . 




AC-CMR 




t 0.000010 V 


0. 




NMR 




1 0.0100 V 



DC VOLTMETER INPUT RESISTANCE TEST 



3456A 


Test 




Range 


Reading 


Test Limits 


10 V 


V 


9.99900 V tp 10.00000 V 


100 V 


V 


9.0900 V to 9.091 7 V 



AC VOLTMETER INPUT IMPEDANCE TEST 



Front-Terminal Reading (Step a): 
Front-Terminal Reeding (Step I): 
Rear-Terminal Reading (Step a): 
Rear-Terminal Reading (Step k): 



V (0.66443 V to 0.66887 VI 

V 00.61017) 

V (0.66443 V to 0.66887 V) 

V 0 0.70822) 



2 







PERFORMANCE TEST CARD (Cont'd) 



AC VOLTMETER ACCURACY TEST (OPTION 001 ONLY) 



34S5A 345SA 

Frsquency | Fraguencv I Input | 345EA Reading Reading 

lACV) (FASTACVI Level Range (ACV) IFASTACVI Teit Umi»* 



X Hz 300 Hz IV IV 

50 Hz 500 Hz IV IV 

100 Hz 1 kHz IV IV 

10 kHz 10 kHz IV IV 

50 kHz 50 kHz IV IV 



100 kHz 100 kHz IV IV 



X Hz 
50 Hz 
100 Hz 
10 kHz 
50 kHz 
too kHz 



300 Hz 
500 Hz 
1 kHz 
10 kHz 
50 kHz 
100 kHz 




X Hz 


300 Hz 


10 V 


10 V 


50 Hz 


500 Hz 


10 V 


10 V 


100 Hz 


1 kHz 


tov 


10 V 


10 kHz 


10 kHz 


10 V 


10 V 


20 kHz 


20 kHz 


10 V 


tov 


50 kHz 


50 kHz 


10 V 


10 V 


100 kHz 


100 kHz 


10 V 


10 V 


XHz 


300 Hz 


100 V 


100 V 


SO Hz 


500 Hz 


100 V 


100 V 


100 Hz 


1 kHz 


100 V 


100 V 


10 kHz 


10 kHz 


100 V 


100 V 


50 kHz 


50 kHz 


100 V 


100 V 


100 kHz 


100 kHz 


100 V 


100 V 




XHz 300 Hz 

50 Hz 500 Hz 

100 Hz 1 kHz 

10 kHz 10 kHz 

250 kHz 250 kHz 

250 kHz 250 kHz 



1000 V 
1000 V 
1000 V 
1000 V 
1 V 
6V 



1000 V 
1000 V 
1000 V 
1000 V 
1 V 
10 V 




‘Record 24-hour or 90-dav teft limits from tables designated in tfw 
test procedure. Derive 6-month test limits from specifications listed 
in Table 1-1. 



3 





















Maintenance described herein is performed 
with power supplied to the instrument, and pro- 
tective covers removed. Such maintenance 
should be performed only by service-trained 
personnel who are aware of the hazards in- 
volved {for example, fire and electrical shock). 
Where maintenance can be performed without 
power applied, the power should be removed. 





Model 3455A 



Section V 



SECTION V 
ADJUSTMENTS 



S-1. INTRODUCTION. 

S-2. This section contains complete adjustment procedures 
for the Model 34S5A Digital Voltmeter. After the instru- 
ment is adjusted according to the procedures given in this 
section, it should meet the 24-hour accuracy specifications 
listed in Table 1-1. 

5- 3. EQUIPMENT REQUIRED. 

S4. The test equipment required for the adjustments is 
listed at the beginning of each adjustment procedure and 
in the Recommended Test Equipment table in Section I. 
If the recommended equipment is not available, use sub- 
stitute equipment that meets the critical specifications 
given in the table. 

6- 5. ADJUSTMENT INTERVAL. 

5-6. The 3455A adjustments should be performed at 90- 
day or 6-month intervals depending on the environmental 
conditions and your specific accuracy requirements. Adjust- 
ments should also be performed after the instrument has 
been repeaired. 

5-7. ADJUSTMENT SEQUENCE. 

5-8. The 3455A Adjustments must be performed in the 
sequence in which they are presented. If the dc and ohms 
accuracy of the instrument are satisfactory, the DC Zero 
Adjustments and Reference Adjustments can be omitted 
and the RMS or Average Converter adjustments can be 
performed to optimize the ac voltmeter accuracy. 

5-9. TEST POINT AND ADJUSTMENT LOCATIONS. 

S-10. Test points and adjustments arc labeled on the top 
inner cover and rear panel (Reference Module) of the 
instrument or arc shown in figures designated in the adjust- 
ment procedures. 

S-11. DC ZERO ADJUSTMENTS. 

Equipment Required: 

DC Digital Voltmeter (-hp- Model 3490A or 3455A) 

a. Remove the 34SSA top outer cover and top inner 
cover to gain access to the AlO (Mother) board. 

b. Set the 34SSA controls as follows: 

FUNCTION DCV 




Figure 5-1. 100 Volt Zero Adjustment. 



RANGE 10 V 

HIGH RESOLUTION ON 

AUTO CAL OFF 

GUARD ON 

TRIGGER INT 

MATH OFF 



c. Set the test DVM to measure dc volts (autorange). 
Connect the DVM’s low input to the A1 0 board ground test 
point and the high input to AlOTOI (Figure 5-1). 

d. Adjust A10R66 (Figure 5-1) for a DVM reading of 
0 V ± 50 microvolt. Disconnect the test DVM. 

e. Set the 3455A RANGE to lOOVand AUTOCALto 
ON. The 3455A Reading should be 0.0000 V ± 1 count. If 
it is not, repeat Steps b through d. If this does not correct 
the problem, refer to Section VIII for troubleshooting 
information. 

f. Reinstall the top inner cover with two or three screws 
and reinstall the lop outer cover (bottom covers must be 
installed). 

g. Set the 3455A RANGF. to 1 V. Connect a copper 
shorting strap across the 3455A INPUT terminals. 

h. Allow the 3455A to run at room temperature for 
at least 30 minutes. 

i. The 3455A reading should be 0.000000 V ± 4 counts. 
If it is, proceed to the DC Reference Adjustments (Para- 
graph 5-12). If it is not. it will be necessary to change the 
value of padding resistor AlORIlO as outlined in the 
following steps. 

j. Record the 3455 A reading: . 



5-1 










Section V 



Model 3455A 




k. Remove the top covers and note the value of 

A10R106 — if there is an R1 10 installed (sec Figure 5-2). 
Refer to Table 5-1 and record the Offset Voltage that cor- 
responds to the current value of AlORl 10: (If there 

is no AlORl 10, record 0.000000 V.) If R1 10 is connected 
to the terminal marked “+”. the polarity of the Offset 
Voltage is negative: if RllO is connected to the terminal 
marked the polarity of the offset is positive. 

l. Add the voltages recorded in Steps j and k to obtain 

the total offset: 

m. Refer to Table 5-1 and locate the Offset Voltage 
that is closest to the total offset voltage recorded in Step I. 
Obtain a resistor that corresponds to that offset voltage. 

n. Remove the original AlORl 10 (Figure 5-2). If the 
total offset (Step I) is positive, connect the new RllO 
between the unmarked terminal and the terminal marked 

if the total offset is negative, connect it between the 
unmarked terminal and the terminal marked “+”. 

o. Reinstall the top covers and again allow the instru- 
ment to run at room temperature for 30 minutes. At the 
end of that period, the 34SSA reading should be 
0.000000 V ± 4 counts. If it is not. repeat Steps j through 
n. 

Table 5-1. DC Zero Adjustment Padding List (A10R110). 



Offset 

Voltage 


Resistor 

Value* 


-hp- Part No. 


0.6 mV 


3M 


0683-3055 


1.0 mV 


1.5 M 


0683-1555 


1.6 mV 


1.0 M 


0683-1055 


2.0 mV 


750 K 


0683-7545 


2.5 mV 


620 K 


0683-6245 


3.0 mV 


510 K 


0683-5145 


3.5 mV 


430 K 


0683-4345 


4.0 mV 


360 K 


0683-3645 


4.6 mV 


330K 


0683-3345 


5.0 mV 


300 K 


0683-3045 



*AII resistors are t 5%, 1/4 W. Carbon. 



5-12. DC AND OHMS REFERENCE ADJUSTMENTS. 

S-i3. The IX Transfer Standard required for the following 
adjustments must be adjusted for optimum I-volt and 
10-volt output accuracy using NBS-calibrated voltage 
standards. The Transfer Standard should be adjusted just 
prior to use. After adjustment, it should be left on and, if 
possible, kept in a controlled environment where the 
ambient temperature is within one or two degrees of the 
temperature at which it was adjusted. The following pro- 
cedure should be performed in that same environment. 

S-14. Adjustment Procedure. 

Equipment Required: 

DC Transfer Standard (Ruke Model 731 A) 

Standard Resistor (1 kilohm ± 0.0005%; Guildline 
9330/1 K) 

Standard Resistor (100 kilohm 1 0.002%: Guildlinc 
9330/100 K) 

NOTE 

Ail of the reference adjustments are screw- 
driver adjustments and are accessible through 
holes in the rear panel of the Reference Module 
(rear panel of instrument). Adjustment 
Designators are marked on the panel The 
adjustments should be performed after a 30- 
minute warmup period with all covers installed. 

a. Set the 3455A controls as follows: 



FUNCTION DCV 

RANGE 10 V 

HIGH RESOLUTION ON 

AUTO CAL ON 

GUARD ON 

TRIGGER INT 

MATH OFF 



b. Set the DC Transfer Standard for an output of 10 V. 
Using short pieces of number 20 AWG (or larger) insulated 
solid copper wire, connect the output of the Transfer Stan- 
dard to the 3455A INPUT. 

c. Adjust the 10 V pot for a 3455A reading of 
t 10.00000 V. 

d. Set the Transfer Standard for an output of 1 V. Set 
the 34S5A RANGE to I V. 

e. Adjust the 10:1 pot for a 345SA reading of 
1.000000 V(± 1 count). 

f. Set the 3455A RANGF. to 10 V and set the Transfer 
Standard for an output of 10 V. 

g. Repeat Steps c through f until optimum adjustment 
is obtained. 



5-2 








Model 3455A 



Section V 



h. Disconnect the DC Transfer Standard. Set the 3455A 
FUNCTION to 4-WIRE K OHMS and RANGE to 1 . 

i. Using short pieces of number 20 AWG insulated solid 
copper wire, connect the 1 kilohm Standard Resistor to the 
3455A INPUT and OHMS SIGNAL terminals in a 4-wire 
ohms measurement configuration. 

j. Adjust the 1 kilohm pot for a 3455A reading of 

1.000000 kilohm. 

k. Disconnect the 1 kilohm Standard Resistor and 
connect the 100 K standard resistor using the same 4- 
wire ohm measurement configuration. 

l. Set the 34S5A RANGE to 100. 

m. Adjust the 1 megohm pot for a 3455A reading of 

100.0000 kilohm (± 1 count). 

n. Set the 3455A RANGE to 1 . Repeat Steps i throu^ 
m to obtain optimum adjustment. 

5-15. RMS CONVERTER ADJUSTMENTS (A1S Assy., 
Standard Model 3455A Only). 

NOTE 

For 3455A Option 001 instruments, refer to 
the Average Converter Adjustments (Para- 
graph 5-16). 

Equipment Required: 

AC/DC Digital Voltmeter (-hp- Model 3490A or 
3455A) 

DC Standard (Systron Donner Model 106A) 

AC Calibrator (-hp- Model 745 A) 

a. Set the 345SA controls as follows: 



FUNCTION ACV 

RANGE 10 V 

AUTO CAL ON 

GUARD ON 

TRIGGER INT 

MATH OFF 

AC-AC/DC(Rear Panel) AC 



b. Connect a short across the 3455A INPUT terminals. 

c. Set the Digital Voltmeter (DVM) to measure dc volts 
(auto range). Connect the DVM low input terminal to TP6 
and the high input terminal to TPS. 

d. Adjust R65 (PREAMP OFFSET ADJ) for a DVM 
reading of 0 V ± 10 microvolt. 

e. Connect the DVM Low to TP6 and High to TPS. 
Adjust R56 (ABS AMP OFFSET ADJ) for a DVM reading 
ofO V ± 10 microvolts. 



f. Disconnect the DVM. Connect a clip lead between 
TP3 and TP6. Adjust R16 (INT AMP OFFSET) for a 
345SA display reading of 0 V ± 1 count. 

g. Remove the clip lead from TP3 and TP6. Adjust R29 
(LOGGER AMP OFFSET) for a 3455A display reading 
between 0.0998 V and 0.1002 V with a 100 mV, 100 Hz 
signal applied to the input terminals. 

h. Set the rear panel AC - AC/DC switch to AC/DC. Set 
the DC Standard for an output of 10 V dc. Connect the DC 
Standard output (Negative Polarity) to the 34S5A INPUT. 

i. Note the 34SSA reading. 

j. Reverse the polarity of the DC Standard’s output and 
note the 34SSA reading. 

k. Adjust R51 (AC- DC TURNOVER ADJ) so that the 
readings in Steps i and j are equal ± 0.0005 V. 

l. Disconnect the DC Standard from the 3455A INPUT. 
Set the rear panel AC-AC/DC switch to AC. 

m. Set the 3455A RANGE to I V. Connect the DVM 
(AC function, autorange) Low to TP6 and Hi^ to TPS. 
Set the AC Calibrator for an output of 1 V, 100 Hz. Con- 
nect the AC Calibrator output to the 3455A INPUT. 

n. Adjust R74 (1 V, 100 Hz ADJ) for a DVM reading 
of 1.00000 V ± 1 count. Disconnect the DVM. 

0 . Adjust R17 (GAIN) for a 3455A reading of 

1 .00000 V ± 5 counts. 

NOTE 

If, in the following steps, there is insufficient 
adjustment range for the 1 V, 10 V or 100 V 
high-frequency (40 kHz) adjustment, the 
adjustment range can be expanded by remov- 
ing the appropriate jumper wire on the A15 
board (see Table 5-2). Refer to the AIS 
board component locator (Section VIII) for 
jumper locations. 

p. Set the AC Calibrator frequency to 40 kHz. Adjust 
R75 (1 V, 40 kHz ADJ) for a 34S5A reading of 1.00010 V 
(tolerance = + 20 counts). 

q. Set the 3455A RANGE to 10 V. Set the AC Calibra- 
tor for an output of 10 V, 100 Hz, Adjust R73 (10 V, 
100 Hz ADJ) for a 3455A display reading of 10.0000 V 
± 5 counts. 

T. Set the AC Calibrator frequency to 40 kHz. Adjust 
R72 (10 V. 40 kHz ADJ) for a 3455A reading of 
10.0010 V (tolerance = + 20 counts). 

s. Set the 345SA RANGE to 100 V. Set the AC Cali- 
brator for an output of 100 V, 100 Hz. Adjust R94 (100 V, 
100 Hz ADJ) for a 3455A reading of 100.000 V ± 5 counts. 



5-3 




Section V 



Model 3455A 



t. Set the AC Calibrator frequency to 40 kHz. Adjust 
C34 (100 V, 40 kHz ADJ) for a 3455A reading of 
100.010 V (tolerance = + 20 counts). 

u. Set the AC Calibrator for an output of 1 V, 100 Hz. 
Set the 3455A RANGE to 1 V. Repeat Steps o through u 
until optimum adjustment is obtained. 

Table S-2. Jumper Removal (A15 board). 



Adiuttment 


Remove 


1 V, 40 kHr 
10 V. 40 kHz 
100 V, 40 kHz 


Jumper 2 
Jumper 3 
Jumper 1 



5-16. AVERAGE CONVERTER ADJUSTMENTS (A13 
Assy., 3455A Option 001 Only). 

5-17. The following adjustments require an AC Calibrator 
such as the -hp- Model 745A. For optimum adjustment ac- 
curacy. the AC Calibrator should be calibrated at I V, 10 V 
and 100 V at 100 kHz. The AC Calibrator's error measure- 
ment control should then be used to adjust out the 
100 kHz errors indicated on the calibration chart. For 
example, if the calibration chart indicates that the 74SA 
output is 0.04% high at 1 V, 100 kHz. set the error mea- 
surement control to + 0.04% to obtain a precise 1 V 
output. The 74SA can be calibrated during a routine per- 
formance test using the procedures outlined in the 745A 
Operating and Service Manual. 

5-18. Adjustment Procedure. 

Equipment Required: 

AC Calibrator (-hp- Model 745A) 

a. Set the 34S5A controls as follows: 



FUNCTION ACV 

RANGE IV 

AUTO CAL ON 

GUARD ON 

TRIGGER INT 

MATH OFF 



b. Set the AC Calibrator for an output of 10 mV, 
1 kHz. Connect the AC Calibrator output to the 34SSA 
INPUT. 



c. Adjust R12 (DC OFFSET) for a 3455A reading of 
0.01000 V ± 3 counts. 

d. Set the AC Calibrator to 1 V, 100 kHz (use error 
measurement control). Adjust R13 (1 V HI FREQ) for a 
345SA reading of 1 .00000 V ± 5 counts. 

e. Set the AC Calibrator frequency to 1 kHz (turn off 
error measurement control). Adjust R36 (1 V LOW FREQ) 
for a 3455A reading of 1 .00000 V ± 5 counts. 

f. Set the 3455A RANGE to 10 V. Set the AC Calibra- 
tor to 10 V, 1 kHz. Adjust R23 (10 V LOW FREQ) for a 
34S5A reading of 10.0000 V ± S counts. 



NOTE 

If, in the following steps, there is insufficient 
adjustment range for the 10 V or 100 V high- 
frequency (100 kHz) adjustment, the adjust- 
ment range can be expanded by removing the 
appropriate jumper wire on the AI3 board 
(see Table 5-3). Refer to the AI3 board com- 
ponent locator (Section VUIj for jumper 
locations. 

g. Set the AC Calibrator frequency to 100 kHz. Adjust 
CIS (10 V HI FREQ) for a 3455A reading of 10,0000 V 
± 10 counts. 

h. Set the 3455A RANGE to 100 V. Set the AC Cali- 
brator to 100 V. 1 kHz. Adjust R46 (100 V LOW FREQ) 
for a 3455 A reading of 1 00.000 V ± 5 counts. 

i. Set the AC Calibrator frequency to 100 kHz. Adjust 
C34 (100 V HI FREQ) for a 3455A reading of 100.000 V 
± 10 counts. 

j. Repeat Steps d through i until optimum adjustment is 
obtained. 

Table 5-3. Jumper Removal (A13 board). 



Adjuttritent 


Remove 


10 V. too kHz 
100 V. 100 kHz 


Jumper 2 
Jumper 1 



5-4 





Model 34S5A 



Section VI 



SECTION VI 

REPLACEABLE PARTS 



6-1. INTRODUCTION. 

6-2. This section contains information for ordering replace- 
ment parts. Table 6-3 lists parts in alphameric order of their 
reference designators and indicates the description, -hp- 
Part Number of each part, together with any applicable 
notes, and provides the following: 

a. Total quantity used in the instrument (Qty column). 
The total quantity of a part is given the first time the part 
number appears. 

b. Description of the part. (See abbreviations listed in 
Table 6-1.) 

c. Typical manufacturer of the part in a five-digit code. 
(See Table 6-2 for list of manufacturers.) 

d. Manufacturers part number. 

6-3. Miscellaneous parts are listed at the end of Table 6-3. 

64. ORDERING INFORMATION. 

6-5. To obtain replacement parts, address order or inquiry 
to your local Hewlett-Packard Field Office. (Field Office 
locations are listed at the back of the manual.) Identify 



parts by their Hewlett-Packard part numbers. Include 
instrument model and serial numbers. 

6-6. NON-LISTEO PARTS. 

6-7. To obtain a part that is not listed, include: 

a. Instrument model number. 

b. Instrument serial number. 

c. Description of the part. 

d. Function and location of the part. 

6-8. PARTS CHANGES. 

6-9. Components which have been changed are so marked 
by one of three symbols; i.e.. A, A with a letter subscript, 

e.g.. A 3 , or A with a number subscript, e.g., A| 0 . A A with 
no subscript indicates the component listed is the preferred 
replacement for an earlier component. A A with a letter 
subscript indicates a change which is explained in a note at 
the bottom of the page. A A with a number subscript indi- 
cates the related change is discussed in backdating (Section 
VII). The number of the subscript indicates the number of 
the change in backdating which should be referred to. 

6-10. PROPRIETARY PARTS. 

6-11. Items marked by a dagger (t) in the reference desig- 



Table 6-1. Standard Abbreviations. 




6-1 






Section VI 



Model 3455A 



nator column are available only for repair and service of 
Hewlett-Packard Instruments. 



6-12. EXCHANGE ASSEMBLIES. 

6-13. Exchange assemblies are factory repaired and tested 
assemblies and are available only on a trade-in basis; there- 
fore, the defective assembly must be returned for credit. 
For this reason, assemblies required for spare parts stock 
must be ordered by the new assembly part num^r listed in 
Table 6-3. 

6-14. For service convenience, the Processor Assembly 
(A3) and Reference Assembly (A1 1) may be replaced on an 



exchange basis. Use the following part numbers and descrip- 
tions when ordering the exchange assemblies. 

Processor Eschange Assembly (A3), -hp- part number 
03455-69503, 

Reference Exchange Assembly (All), -hp- part num- 
ber 11177-69501 

6-15. SERVICE KIT. 

6-16. A service kit is available to aid in the repair of the 
345SA. This kit contains Processor and Reference Assem- 
blies (A3 and A1 1) and selected components necessary for 
efficient repair. The Service Kit may be ordered through 
your nearest Hewlett-Packard OlTice. Order Service Kit 
Number 03455-69800. 



Table 6-2. Code List of Manufacturers. 



Manufacturer 

Number 


Manufacturer Name 


Address 


FR002 


EFCO Componantt 


Saini-Malo France 35 


GM077 


Amp Deutschland 


Germany 


00000 


U.S.A. Common 


Any Supplier of the U.S. 


0011J 


Jermyn Irxlustries 




0022U 


Uitited Chemicon Inc 




01121 


Allen-Bradley Co 


Milwaukee. Wl 53212 


01295 


Texas Instr Inc Semicond Cmpnt Oiv 


Dalles, TX 75231 


02735 


RCA Corp Solid Stats Oiv 


Sommerville, NJ 08876 


03888 


KDI Pyroftlm Corp 


Whippiny, NJ 07981 


04713 


Motorola Semicortductor Products 


Phoenix, AZ 85008 


07263 


Fairchild Semicor>ductor Oiv 


Mountain View. CA 94040 


11236 


CTS of Berne Inc 


Berne, IN 46711 


11237 


CTS Keene Inc 




11S02 


TRW Inc 6oona Oiv 


Boone, NC 28607 


14140 


Edison Elek Oiv McGraw-Edlson 


Manchester. NH 03130 


15818 


Teledyne Semiconductor 


Mountain View. CA 94040 


16365 


Dayton Roeers Mfg Co 


Minneapolis, MN 55407 


17856 


Sellconix Inc 


Santa Clara. CA 95050 


19701 


Mepco/Electrs Corp 


Minaral Wells. TX 76067 


24226 


Gowstrda Electronics Corp 


Gowanda. NY 14070 


24355 


Analog Devices lr>c 


Norwood, MA 02062 


24546 


Cornirrg Glass Works (Bradford) 


Bradford, PA 16701 


24931 


Specialty Connector Co Inc 


Indianapolis, IN 46227 


27014 


National Semiconductor Corp 


Santa Clara, CA 95051 


27264 


Molax Products Co 


Downers Grove. II. 60515 


28480 


Hewlett-Packard Co Corporate HQ 


Palo Alto, CA 94304 


32997 


Bourns IncTrimpoi Prod Oiv 


Riverside, CA 92507 


34335 


Advanced Micro Devices Inc 


Sunnyvale, CA 94086 


66289 


Sprague Electric Co 


Nonh Adams, MA 01247 


71785 


TRW Elek Components Cinch Div 


Elk Grove Village, IL 60007 


72136 


Electro Motive Corp Sub lEC 


Willimentic.CT 06226 


73138 


Beckman Instruments Inc Hellpot Div 


Fullterton, CA 92634 


74970 


Johnson E F Co 


Wiseca, MN 56093 


76915 


Littelfuse Inc 


Das Plaines. IL 60016 


79727 


C-W Industries 


Warminster. PA 18974 


8G464 


Bergquist Co 


Minneapolis, MN 55420 


91637 


Dele Electronics Inc 


Columbus. NE 68601 


91833 


Keystone Electronics Corp 


New York. NY 10012 


99800 


Amer Pren Ind Inc Oeleven Div 


Aurora. NY 14052 



6-2 





Table 6-3. Replaceable Parte 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


ai 




1 


6»C A93iUiV» 0UT6O H6 


2SNSD 


OSASS-SRSOl 


*ILl 


QibO-OAAZ 


3 


CAPACIIW'EZD SlOPf T-»S SaMTK MICA 


21460 


0140-0362 


Ut* 


OlfU-0291 


}i 


CAPACIIOS-FAO tUF*-10S SSTOC TA 


54219 


19001 09X903 5 A2 




OIKHOdTA 


s 


CAPACInU'FXQ lOUFT-lOS 20VK TA 


94269 


1SM1MXV020S2 


*tc* 


otio-oi9r 


7 


CAFACIIOA-FXO 2.2UFT*10S 20VK lA 


94269 


ISM22SX<020A2 


*•(» 


OttO-lTS* 


9 


CA3ACIT06-FA0 •220F*-10$ 39VDC lA 


S62l» 


ISM22AKI0SSA2 


AtU* 


OitlO>Ol97 




CAPACItua-FKO 2.2UFF-I9S 2SVK TA 


942 09 


19OD225X9O20A2 


Aicr 


01AO-a7i> 




CAFACttOI-FXO .22UF«-I0X SSVK lA 


M2S* 


1 90022 4X9 03 9 A2 




0iM-U374 




CAFACIIOA-FX0 10UF*-1QX 20T0C lA 


96219 


1SM1MXSO20S2 


AIL9 


OtSO-OI«T 




CAPACIIOA-FXS 2.2UFF-10I 20TK lA 


S*2S* 


IS0D22SXT02M2 


AUU 


011^1739 




CAFACIfOt-FXO *220^4-101 3SVX 7A 


M2S9 


1900224X90) 5A2 




OISO-OSTA 




CAFACITOA'FXO lOUfF-lOS 2DV0C TA 


94269 


IS0D10RX9S20S2 


«Kll 


OlW-OIEt 


1 


UPACIIOA-fXO 2«206 4-20S 5O4V0C C£6 


26410 


01SO-0I2S 


«kCt* 


OltO-OjTA 




CAfACIIO*-PXO tOOF^-lOS 20V0C TA 


54264 


I50DIMX9020B2 


AUtO 


OIMKUat 




UPACIIM-flO 107*-10l 35VOC lA 


S42SP 


ISOO>OSX«0)SA2 


AK17 


oioo*o«vt 




CAPAtlfm-FXO 1UF*-1DS 39V0C lA 


94269 


ISOD10SX901SA2 


04.U 


rilf0-0««3 


3 


CAfACITOA-FXO 10000Fe90-10t 25VOC At 


0022U 


29V6StlOOO 


AICI9 


uiao-o^2i 


1 


CAFACItIM'FXO 22UFF-10X ISVOC TA 


54269 


19002241901362 


ALL4L 


OiAO-Or9t 




CAFkCIIO«-FXO li2F*>10t 3SV0C TA 


54269 


15001 05X903 9 A2 


Alta 


OiaO-OA94 


1 


CA4AClTOft-fZO 79000f«100-10l UV04 At 


26460 


0160-0494 


AMi 


01 00-0291 




CAFACirat-fXO 1UF4-10S 39VOC 7A 


M2IS 


1500105X903562 


Aii.^4 


0100-0291 




CA4AC1TU6-FAD 1064-106 39V0C lA 


54269 


tSOOIOSXSOSSkS 


Aii,^» 


0100-0291 




CA6ACJfOft-6XO 106^101 39VOC fA 


94269 


tSODI05X»SS»A2 


Ait^A 


0140-0190 


2 


CAFACirOft-FAO 20066 4-Sl 3004V0C AICA 


72ISE 


ON1562QlJ03006VtCA 


Aiw^7 


0100-0291 




CAFACITDR-FXO iUFWOX SSVOC TA 


94269 


19001 05X9 03 5A2 


Aiu^a 


0100-2204 


9 


CAFACITCW-FXO lOOFF F<St 300UV0C MICA 


26490 


0140-2204 


AIC^y 


0100-1739 




CA6 AC 1106-6X0 •22U64-106 35VDC tA 


94299 


1500224X903562 


Altil 


0100-0291 




CA6ACJfU6-6XD i06«-106 35VDC 1A 


M2SF 


15001 05X9 03 5 A2 


Atex Aa 


UtSU'l73S 


1 


CAFACIIOX-FXO ^UF«'1IK35VOCTA 


66289 


1i0Q224X90aSA2 


kil,3i 


0140-2409 


4 


CAPACITUR-FXD .02UF F6B-20S 2SMVK CEH 


26460 


0140-2409 


AiUJ9 


Ol«O-O0ft2 




CAFACiim-FXS SIOFF T-Sl S90HV0C MICA 


26460 


0160-0342 


Aik.A» 


0100-0291 




CA6ACIT06-6XO 1J6«-10S 35V0C fA 


94269 


ISOOlMXSOSStS 


A4l.3b 


0190-0093 


2 


CA6AC17M-6XO .0106 »60-206 lOOaVDC C6R 


26460 


0150-0093 


«iL}r 


0140-0342 




CA6ACI706-6X0 S1066 «-99 300490C. MICA 


26460 


0160-0342 


A1L10 


UlCO-USt 




CAPACIIOR-FXO lUFF-lOS 3SV0C TA 


96209 


1500109X903 9 A2 


AUA4 


Ot 00-0291 




CA6A;1T0A-FX0 IUF^IOX 39V0C TA 


94269 


1900109X903962 


A1C41 


0160-0196 


1 


CAPACITOR-FXO ISOVF t-20K 2S0WVAC CER 


Tsteo 


0I6O-OI9S 


A1C4? 


0160-0391 




CAPACITOB-FXO lUf ♦-1W 38V0C TA 


seres 


1500105X9Q3SA2 


AIC43 At 


OieO-0291 




CAPACITOR- 6XD igf <^-10% 36VOC TA 


M200 


1S00106XS03SA2 


A1C44 Ac 


0180-1701 




CAPAaTOR-Fxe S8UF *-nK svoc ta 


IM200 


isooeesxooosA! 


AUAi 


1901-0200 


4 


D103E-6HR RECT lOOV 1*5A 


04713 


SA1644-9 


AtCK^ 


ISOl-iUOO 




0l03E-6tfR (UCT lOOV 1«9A 


04713 


SR1644-9 


Ai4.K4 


1901-0050 


45 


0100E-SH17CHJNO 60V 200NA 2NS DO-7 


26460 


1901-0090 


Al&Ad 


t9Cl-OV50 




OIOOE-&M1TCM1NC 60V iOQHA 2N& 00-7 


26460 


1901-0050 


AiCAb 


19C1-0050 




OIDJE-SMITCHINC SSV 2Q0IU 2NS 00-1 


26460 


1901-0090 


»IMT 


1902-0431 


3 


O(00t-2M6 1N93516 14V 96 60*96 TC«*756 


04713 


INSiSlS 


AUH« 


1901-0U29 


12 


01U0E-6MR RtCf 400V 790RA 30-29 


26460 


1901-0026 


AiCKV 


1901-0026 




OlOOE-PiiR RECf 400V 7S0M 00-29 


26460 


19P 1-0026 


AaLKU 


1901-0090 




DJ J3E-S4JTUUM0 60V 20QHA 2N$ 00-7 


26460 


1901-0090 


AIUkI^ 


19G2-0049 


5 


DI00E-2HR A.I4V »X OO-I PO-.AH TC*».022S 


26460 


1902-0049 


AiLKt4 


1902-0124 


1 


0100E-2MR 2*4iV 96 00-7 P0*.4W TC«- .0736 


04713 


S2 lOTSt-t* 


AiCHt4 


1902-0431 




0133£-2Nlt 1N93916 14V 96 60«94 fC«*796 


0«M> 


IN53516 


AU«i9 


19C1-U09J 




OlOOE-StfJKnMG 60V 200NA 2NS DO- 7 


26460 


ISOI-MM 


AlbHU 


1902-3134 


1 


D103E-2NH 6.06V 5l 00-7 60«.4tf IC*».0524 


04713 


S2 10939-199 


AiJt 


12 51-3199 


1 


CMMECTOK 4-61N N POST TYPE 


2T2M 


09-*0-IMt(2*0)-MAI 


AtJA 


1251-4313 


1 


CMNECTOA 17-PIH M PObf TVPt 


2T2»A 


22-04-2161 


AIJJ 


1291-3274 


E 


CONNCCtOH 6-0JH M POST TYPE 


2T2A* 


09-SO-IMl 


AU> 


1291-3274 




CONMECIOR 4-PJM N POST TYPE 


2T2S* 


OS-NCKlOAt 


AiJ* 


1S51-SDS> 


) 


CUNNELTOR-PL EUCE IS-CONI/XUK 2-ROMS 


mss 


252-19-30-300 


Aij r 


1291-4315 


1 


CiWRECTUH 7-PIN N POST TYPE 


2T2M 


22-04-2061 


AtJ« 


tASI'AJl* 


t 


CONNiClOK 19-PlN N POST 1YPL 


2I2S* 


22-04-2141 


AKI 




1 


Cau-Nto INH 56 4*40 .190X.44t6 SAF*3NHl 


99600 


2SS0-2B 


AUl 


1493-0010 


9 


THANSJSTOK PNP $1 10-16 PO*ioON4 


26460 


is»'Wia 


AUr 


1494-0210 


3 


IxANSIStOR NPN 2N2222 SI U-14 PO* 900H4 


04711 


2N2222 


AlUA 


1694-Os:10 




THSMSISIOR NPN XN2222 SI TJ-I« PI^SMRK 


04713 


2N2222 


A4U4 


ISS)-UU1J 




IHANSISIO* PMF SI TO-IS PO»UiHW 


26460 


1693-0010 


A|<|b 


1994-0210 




TRANSISTOR NPN 2H2222 SI lU-l* PO-SChMN 


04711 


2N2222 


Aiwb 


1633- OOlJ 




tHANSiSrOA PW SI tO-16 PO«340H« 


26460 


1693-0010 


Alwf 


1693-0420 


IS 


TAA4S1ST0A PI# SI PO-JOOIU 6t«l90NKl 


2S*«0 


lSSS-9029 


A14A 


i»S}-au^4 




TXANSiSTia PNP SI fO*1»<)Na FT«1S0NH2 


26460 


1653-0020 


AlvV 


1653-0020 




TAANSJSTUA PNP SI PU*300Hi> 6T-190N42 


26460 


1653-0020 


Alwii 


1693-0409 


6 


7HANSIST0A Ph# SI DARL 70-220A4 P0-40N 


26460 


ISSS-OAOT 


C4«ao 


0160- W7 




CAPACITOR-FXO .1UF •SO-IOK lOOVOC CER 


26490 


01603622 


AA SEE 


XOTE ON SCHEMATICS 










A 6 $6 1 NOTE ON SCHEMATIC 10 








SEE NOTE ON SCHEMATIC 10 








AG SEE NOTE ON SCHEMATIC 10 









6-i 



Sm introduction to this section tor ordcrinc information 














Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


A40I4 


IA53-0A09 




TAANSUfM AN9 SI OAAL rO-220A6 60*40H 


26410 


1I5J-0409 


Alois 


1193-0409 




TAANSlSTOft 6NP SI (NUU TO-220A6 A0-60U 


21460 


1053-0409 


AlMiA 


li»-0*09 




TAANSlSrOA 664 SI OAAt 7^22066 ?0«40H 


26460 


1053-0409 


Alois 


I0&3-0409 




riUMSISIOI 464 SI 0661 IO-220A0 40-406 


26460 


1059-0409 


AluU 


U9V04I9 




niANSISTOA 464 SI OAIU. TO-220A6 40*406 


26460 


1959-0409 


AlOl? 


I0&3-0409 




TUHSUTOB 464 Si OAAL TO-220A6 40-606 


26460 


1053-0409 


AIOIA 


1093-0409 




rMNSUtOA 464 SI OAAL T0-220A6 41^406 


26400 


1053-0409 


AlAi 


0757-0290 


4 


1USIST04 6»19A 19 »12S6 4 tC-0*-l00 


19701 


PlP4C4/0-f 9-61 91-4 


AU2 


075I-0273 


4 


AiSISTOK 1*0U 19 •lllM 4 TC*0*-I00 


24546 


C6-1/0-T0-3OU-4 


AIMS 


0757-0290 




USISTG6 4«I9K It «I256 4 TC-OWOO 


19701 


N44C1/0-TO-6191-4 


AIHA 


0757-0471 




tESISTOA 1«0U If *1256 4 rC*0»-100 


24546 


C4-1/0- 70-301 1-4 


AU> 


0757-0491 


11 


usism 2K 19 .1256 4 TC«0«-iOO 


24546 


C6- 1/0- TO- 2 001 -4 


AIAA 


0757-0490 




MSlSrOR 6«I9K 19 »lZ>tt 4 TC«0»-100 


19101 


H44CI/I-T0-6I91-4 


AU7 


0 7 57-0271 




AISI6IOI 3.0U It .1256 4 7C«0>-I00 


24546 


C6- 1/9- 70-301 1-4 


AUS 


07 57-0490 




AESISKB 4.I9A It .1256 4 rc«0«-|00 


19701 


A44C1/I-T0-6I91-4 


AIM9 


0757-0471 




AASISIOK 3.01R It «U56 4 7C*0*-|00 


24546 


C4- 1/9-70-3011-4 


AUU 


07S7-OI3O 


1 


AESISIOR 760 It .1256 4 fC-O^-iOO 


24546 


C6- 1/9- TO- 751 -4 


AIHI2 


0757-0001 


1 


AtsisroA 150 It .16 4 rc*o«-ioo 


19701 


M47C-1/2-T0-19I-4 


AIAU 


0490- 44A4 


1 


AESIStn I9.IA It .1256 4 fC*0*-100 


26546 


C4-1/9-T0-1 912-4 


AUIA 


0 7 57-0149 


3 


USISTOt 22. 4R It *1256 4 K«04-100 


24546 


C4- 1/0- TO- 2 2 42-4 


AiAlS 


0757-0200 


3 


WS1SI» 13.3K It .1256 4 rC*0«-100 


24546 


C4- 1/9- TO- 1332-4 


AUi« 


0757-0AL9 


1 


USISTS 461 It .1256 4 tC-04-100 


24546 


C4-1/I-T0-69IR-4 


AIAI7 


0757-0465 


1 


RbSISTOt lOOA It «|256 4 rC«0*-tOO 


24546 


C4- 1/0- TO- 1003-4 


AIAIA 


0757-0149 




MSI 51 « 22.4R It «I256 4 TC*0«-|00 


24546 


C6-1/0-T0-2262-F 


AIAI9 


0757-0280 




MSIST04 113R It .1256 4 fC-O^lOO 


24546 


C4-1/9-T0-1332-4 


A1k2I 


0 7 57-0419 




AESISrOt 411 It .1256 4 fC-O^-lOO 


24546 


C4-l/0-r0-601R-4 




0757-0445 




AESIStOR lOOA It *1256 4 7C-0A-1O0 


24546 


C4-1/0-T0-I003-P 


AU4S 


0490-44A4 




AISIS7QA 19. IK It .1256 4 7C-0«-|00 


24544 


C6-i/0-TO-l912-f 


A|k44 


0757-0280 




AESISTOA 13^ It .1256 4 IC-0«-l00 


24546 


C6-1/0-TO-1332-F 


AU4S 


0757-0419 




Atsisrn 461 It .1256 4 fc-o*-ioo 


24S46 


C6-l/0-ro-60lR-4 


A1K^» 


0757-0445 




AESISTOA lOOA It .1256 4 FC-0«-l00 


24546 


C4- 1 / 0- T 0- 1 001-4 


A1K27 


04 96-4464 




AESISrOA 19.U It *1256 4 TC«0^I00 


24546 


C4-1/0-T0-I912-4 


AlK^d 


0757-0149 




AESISIOI 22.46 it .1256 4 IC-O^iOO 


24546 


C6-l/0-r0-2262-F 


AIA4V 


0757-0410 


t 


AESIS7CA 901 IS .I2S6 4 IC-0*-IOO 


24546 


C6- 1/0- TO- 3 01 A- 4 


AlAil 


0757-0445 




A2SIS1A lOOA It .1256 4 TC-OWOQ 


24546 


C4- I/O- TO-1 003-4 


AIA3< 


0757-0461 




AESIS10A it IS .1256 4 7C*0»-100 


24546 


C4- I/O- 70-20 01 -4 


AlASa 


0757-0260 


11 


AESlSflR II IS .1256 4 fC*0^iOO 


24546 


C6-I/0-TO-1QDI-F 


AlKi* 


0757-0460 




AESISTCB IK IS .1256 4 TCO*-IOO 


24546 


C4-1/0- TO-1 001-4 


AlAiS 


0757-0444 


6 


AESISTOl lOK IS *1256 4 7C-0«-100 


24546 


C4-I/0-T0-10O2-F 


AiKSA 


0757-0461 




AESISIOA 2A It *1256 4 r&-0*-100 


24546 


C4- I/O- f 0-2 001-4 


AIK37 


0757-0411 




AESISTQA 2A It .1256 4 TC-04-100 


24546 


C4-t/9-l0-20Ol-F 


AIK30 


0757-0261 




AaSISTOA 2A is *1256 4 TC-0*-l00 


24546 


C6-1/0-TO-2901-4 


A|K3V 


0757-0461 




KESISIV 2A IS .1256 f TC-0«-|00 


24546 


(4.1/6. T0-2Q01-F 


AIAAO 


1610- 0055 


1 


6Et«0AK-AES 9-P16-SJ4 .IS-PIN-SPCC 


21400 


1010-0055 


AUAi 


0757-0199 


2 


MSISrOA 21.SK IS .1256 4 IC«0«-100 


24546 


C4- 1/9- TO -2 152-4 


AIKA4 


0757-0199 




AtSISlOA 21.5A IS *1256 4 7C«0«-100 


24546 


C4-1/0- 70-2 152-4 


AlUhi 


0 757-0471 




MSIS1QA 3*0IR It .1256 4 TC-04-100 


24546 


C4-1/0- T0-3011-F 


amaa 


0757-0442 




AESISlOA lOK It *1256 4 7C-04-100 


24546 


C 4- 1/9- 70-1 002-4 


A1aA> 


0496-4451 


1 


AESIS1QR 402 It *1256 4 IC-04-100 


24546 


C6-1/0-70-402R-4 


Ai*tA« 


0 7 57-0401 




AlSISlOA 100 It .1256 4 fC-04-100 


24546 


C4- I/O- TO-1 01 -4 


AIMA7 


0 757-0146 


1 


NiSISlOK 14 IS .1256 4 K-0*-I00 


2.4S46 


C4-l/9-rO-34AO-F 


AiAeo 


07 57-0407 


1 


AfcSiSm 200 IS .1256 4 TC-0«-|00 


24546 


C6-1/9-TO-201-4 


AIHA9 


0757-U407 




AESJSrC* 200 It *1256 4 TC«0*-100 


24546 


CVl/9-IO-20i-4 


AlHSL 


0 757-0429 


2 


AESlStOA 1.62K 16 *1256 4 IC«0»-100 


24546 


C4.I/9. TO-1 921-4 


A|K»I 


0757-0460 




AlSlSICIt IK IS .1256 4 fC*9^lOO 


24546 


CVl/O-TO-IQOl-F 


A|i(» 


07 57-0429 




AESISIUK 1.62K IS *1296 4 fC«OWOO 


24546 


C6-|/|.fO-l02i-4 


AIa>* 


0757-040? 




AtSISIA 200 It .1256 4 TC*0«-iOO 


24546 


C6- 1/9- TO- 2 01-4 


A|A>» 


04 96-4123 


1 


ACSISroi 499 it *1256 4 TC*0*-100 


24546 


C6-1/9-T0-499A-4 


AImM 


0757-0«61 




AESlSUil 2R it *1256 4 fC«0*-lOO 


24546 


C6- 1/9-70-2001-4 


AIhSI 


0 7 57-0461 




AES1S7« 2K 11 *1256 4 K«0»-100 


24S46 


C6-1/0-T0-200I-F 


AlH>l» 


07 57-0461 




AESlsm 2K it *1256 4 fC-0*-lOO 


24546 


C6-1/0-TO-200I-4 


AlK>y 


0757-0460 




AESISlOA IK IS *1256 4 rC«0^100 


24546 


C4- I/O- TO-1 001-4 


AlMbi 


0757-0460 




AESlSm IK IS .1256 4 TC*0*-100 


24546 


(4.1/6. TO-1 001-4 


AiAW 


0757-0460 




AESISlOA IK It .1256 4 TC«0*-IOO 


24546 


C4-1/O-IO-10O1-4 


AI«U»3 


07 57-0440 


1 


AtSISfUR 750 it .1256 4 TC«0*-100 


24546 


C4-1/0-T0-751-4 


AU6I 


0 7 57-0260 




AESISlOA IK IS .1256 4 K.-04-100 


1 24546 


C4-l/0-tO-l001-4 


A|A6d 


07S7-y«60 




AISISIGR IK IS .U56 4 7C-0»-I00 


1 24546 


C4-l/0-T^lQ01-4 


AiHOA 


0757-0460 




AESISIDt IK IS .1256 4 fC-O*-100 


2654 5 


C4-1/0-TO- 1001-4 


AIKA7 


0757-0460 




AISISIQA IR 14 *1256 F 7C-0*-l00 


24546 


L4-l/0-fO-| 001-4 


A1R08 Aa 


0707-OU2 




AESISTQA 10K 1% 125W 


03292 


C4-1/VTQ.1002-F 


A1H99 Ae 


07S7>^1 




AESISTQA 100 1% 12SW 4 TC-0*-l00 


03292 


C4.1/S.TO-101-4 


A1S1 


3101-1678 


1 


8WrTCH-SL 7-1A-NS DIP-SLIDE -ASSY U 


11237 


206 Tvn 


AiUI 


1640-1400 


2 


K-OISITAL S6744.S05N TTL LS HtS 1 


01295 


SN74LS05N 


A|J< 


1620-1197 


7 


Jl-OICIIAL SN74LS00N TTL LS OOAO 2 NANO 


01295 


SNT4LS00N 


AIU4 


1620-1053 


1 


IL-0I6IIAL SN7414N TIL HEK 1 


01295 


SN7414N 


AI«H 


l62CKm4 


9 


K-OI&ITAL $N74tS74H 7TL LS OUAl 


01295 


SN74LS74N 


A1^9 


162^1400 




IC-DIOITAL »N74LS05H ItL L$ HEX i 


01295 


SN74LS05N 



NOTE ON SCHEMATIC 10 
A% SEE NOTE ON SCHEMATIC 10 



Se« Introduction to thii wctlon for ordering inforruAtion 



6-4 













Table 6‘3. Replaceable Parts 



Reference 

Designation 


RPPart 

Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


aiu* 




6 


IC-0I6ITAL nC34418 7U* QUAD 


0611) 


MC34416 


AtOT 


1920-4209 


2 


IC-0I6ITAL 6«741.$27N fIL IS T6i i NOft 


0129S 


SMT4LS2TN 


Alue 


1A20-U99 


6 


IC-0I6ITU SNI61S06N ITl IS HES 1 


01295 


SN26LS06N 


Alwl9 


lt»-lSSI 




tC-OIOITAl NC)6619 TU6 9UA0 


0611) 


NC 34418 


AiJlV 


1920-U99 




IC-016ITA1 SH761S06N ITL IS HEI 1 


01299 


SNI6LS06N 


AiUU 


1920-1196 


26 


IC-OI6lfAL &N74iS174H TIL LS HEX 


01299 


SN74L S174N 


AiJl^ 


4920-45S6 




IC-OIOIIAL NU4418 TU8 QUAD 


0611) 


HC166IP 


AiJiA 


1620-1201 


9 


IC-OI6tTAL SN74CS06H ITL L% OUAO 2 ANO 


01295 


SNIALSOON 


AiUlA 


1«»-U«T 




|C-dl6ITAL SM74LSMN TIL LS QUAD 2 NAMO 


01295 


SNT6LS00M 


AliJid 


1SW-U9I 


9 


IC-D16MAL SM74L$0Sn ITL i$ QUAD 2 NANO 


01295 


SHTALSOIN 


AiUiA 


192^1199 




IC-0I6ITAL SK74LS0M TTL LS QUAD 2 NAMO 


01299 


SMT4LS03N 


Aiuir 


1920-U99 




IC-0I61IAL SM74LS03N TTL LS QUAD 2 NANO 


01299 


SM74LS03M 


Aigu 


is20-U9a 




IC-0I6ITA1 SNTHSOSN tU IS BUAO 2 NANO 


01295 


SNTHSOSN 


AIJ49 


ia^U96 




IC-DieiTAl SNT6I.S1T6N TTl LS HE« 


01295 


SHTHSIT6N 


AlJlli 


192^1196 




IC-OIOIIAL SNT6LSI16N IK LS HEX 


91299 


SM7H41 74H 


kUil 


ll20-l»kA 


6 


iL-OIOtlAL SN74LS12SN TTL LS QUAD 4 8US 


01299 


SN74LS425H 




1920-1S69 




1C-0I6ITAL SN74LS12SN TIL LS QUAO 1 6US 


01295 


SNI6LS125N 




tHW-ll9b 




IC-OICIIAL SN76LS1T6N fIL LS HU 


01295 


SHTALSITAN 




ia2a~u94 




IC-OIGITAL SH74LS174N TTL LS HEX 


01295 


SNIHSITAN 


AtJ2> 


4»20-U96 




IC-OIOiru SHT6LS1T6N TIL LS HEX 


01295 


SM7HS1 74N 


AtJ2» 


192^1112 




1C-0I61TAL SN74LS74N TTL LS DUAL 


01299 


SN74LST4N 




4906-0079 


1 


DIODE AAUT 


28480 


1906-0079 


A4i^2» 


4920-1290 


8 


IC-OIOtlAL SN76L$iaiN TIL LS 


01295 


SNT4LSISIN 


AIJ2V 


4020-1496 




le-OISITAL SNI6LSU6N IIL LS HEX 


01295 


SHTALSITAN 


AIJJ4; 


1920-1290 




IC-DI OCTAL SHT6LSiaiH ITL LS 


01295 


SNTHSl aiN 


AlJJi 


1920-1196 




IC-0I6ITAL SN74LS174M TIL LS HEX 


0U99 


SNT4LS1 74H 


AliJM 


1929-Uat 


1 


IC-OieilAL SMT6LSS2N TTL LS QUAD 2 OR 


01295 


SNTALS)2N 


AtJAi 


4 9 20-12 1 6 


7 


IC-OIOITAL SNIALSDIN TTL LS ) 


01295 


SNTALSDON 


Aii^^A 


4920-l»69 




IC-OICITAL SNI6LS12SN IIL LS flOAO 1 BUS 


01295 


SNIALS129N 


AiJJ> 


4920-1669 




iC-OI6ITAL SN74LS129N TTL LS QUAD 1 BUS 


01299 


SH74LS129N 


Ati^M 


IS 20-102 


Z 


1C-0I41T6L SN74LS169H TTL LS BIN 


01255 


SM74LS163N 


AUaT 


1S2D-102 




SC-0T61TAL SN74LS163N TTL LS BIN 


01295 


SNTALSI4)N 


AlgAA 


1S20-120I 




tC-0l6JTAL SN74L506N TIL LS QUAD 2 AND 


01295 


SNTALSOSN 


AiU^H 


1920-1199 




IC-aiOIISL SMT6LS06N IIL IS HEX 1 


01299 


SNTALSOAN 


AIJ40 


482(^1412 




!C-OI6liai SNT6LS76N TIL LS UOAl 


01299 


SN74LS74M 


AiJAi 


IS20-I216 




SC-OIOIIXL SNT6LSt)SN TIL LS I 


01299 


SNTALSDSH 


AIU42 


19^1969 




IC-OieiTXL SNT6LS12SN TTL IS OUAO 1 SUS 


01295 


SNTALSI25N 


A1J%) 


1820-1660 




IC-0I61TXL $HI6LS12SN ITL LS OUAO 1 aUS 


01299 


SN74LS129M 


AlgAA 


iaiB-0199 


2 


IC AH9112APC IK BAN NHGS 


94339 


AR9112APC 


Ai0«& 


1616-0199 




1C AN9I12APC IK AAM MHOS 


34939 


AH9112AK 


Ai JA6 


1820-4198 




IC-OtQITAL SN74LS03N TTL LS QUAD 2 NAMO 


01299 


SNTALSOSN 


AtJ^r 


1S20-U0I 




IC-0I61TAL SN74LS06M TTL LS QUAD 2 AMD 


01299 


SN76L S06N 


AigAM 


l920-442i 


1 


IC-llCITAL SM26LSI2)H IIL LS DUXL 


01295 


SM74LS123H 


AIJ49 


1920-1199 




IC-OICIIAL SNI6LS06N TIL LS HEX 1 


01299 


SN74LS04N 


A4g>U 


1621^4197 




IC-OtOITAL SHI6LSOON ITL LS OUAO 2 HAHO 


01299 


SN7US00H 


*iu»l 


1620-4196 




1C-0I61TAL SN74LS174N TTL L$ HEX 


m a 


SHTALSITAN 


A1J92 


1920-1199 




U-OICIIAL SNI6LS06N III LS HEX 1 


■ id 


SNTALSOAN 


AlJii 


1220-1206 




IC-OISJTXL SNI6LS2TN ITL LS IPL ) NUR 




SN74LS2 7M 


Atg>% 


1620-1196 




ic-oieiraL shtalsitan iil ls hex 


01295 


SN76LS174H 


Aij$> 


182^1197 




IC-OISITAL SN74LS00N TTL LS QUAD 2 MANO 


01299 


SM74L SOON 


A4g>e 


1620- 1a*5 


2 


It-DIOIIAL SNIALSDSK TIL LS OUAL 2 


01299 


SNTHS155N 


Ato>r aa 


U2O-0M7 


1 


(C EMCOR TTL L 8-INP 


02231 


93L1»>C 


A40»« 


1020-1196 




IC-OIOITAI SM76LS174M TTL IS HEX 


01299 


SH74LS1 74N 


Ai0»9 


462>‘ll96 




IC-OlCITAL SN74LS03M TTL LS QUAD 2 MANO 


01295 


SN74LSDJM 


Ai jeo 


1620-1196 




K-OIQITAL SM74LS03M TTL LS QUAD 2 MANO 


01299 


SN74L903M 


AlOAi 


1620-1191 




IC-DIOilAL SNIALSOON ITL LS OUAO 2 NANO 


01299 


SN74LS00M 


AIUV2 


1620-1606 


1 


IC-OICIIAL SMIUSASH TIL LS 6 


01299 


SNT4i S48M 


A4J09 


1820-1196 




IC-OICITAL SM74LS1T4H TTL LS HEX 


01299 


SN74LS1T4N 


AiUeA 


1620- 1266 




IC-IIOITAL SMTHSDSN IIL LS OUAL 2 


01299 


SN74CS199M 


A1U»9 


1620-1196 




IC-OICIIAL SN74LS1T4M lU LS HEX 


01295 


SNTHSl TAN 


AiJeo 


4620-1196 




U-OiOIIAL SN76LS1T6H IIL LS HEX 


01299 


SN74LS174N 


Atue? 


1620-1196 




IC-OtCtTAL SN74LS174N TTL LS HEX 


01299 


SNTHSl TAN 


Aiu»a 


1620-1196 




IC-DICIIAL SN74LS174N TTL L$ HEX 


01295 


SNTHSl TAN 


4ioe9 


1820-1196 




JC-OICITAL SN7HS474M ITL LS HEX 


01295 


SNTHSl TAN 


A407U 


1820-1196 




IC-OICiraL SHIHSCIAN IIL LS HEX 


01299 


SNTHSl TAN 


Aign 


1620-1760 


1 


ic-ouiiAL usaaasN nos* osn. orvr 


21014 


DS6063M 


AUl 


JAi<>igoi 


1 


CHTSIALi OUARIl U HH2 


28480 


0410-1001 




1200-0489 


1 


SUCKETIIC 14-eiN K NUUNriNC 


28480 


1200-0419 




1200-06 7) 


2 


SUCXEI-IC lA-LONT OIP-SIOR 


26480 


1200-0473 




gi« 0 - 0»86 


Z 


•6US S6R-Ra2) 


00000 


060 




03 60-0»67 


9 


•88S 6AR-H626 


00000 


Q8D 




9040-047U 


2 


CUlOElKUC-lN RC BOARD 


26400 


9040-0170 



&A S£E NOTE ON SCHEMATIC 10 



See Introduction to this teetion lor ordering Information 





















Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Oty 


Description 


Mfr 

Code 


Mfr Part Number 




0345^66502 


1 


K aS$EnH.9> DISE1.8T 


2046O 


03495-64502 


S.ICK1 


I95O-0547 


36 


U0-VI$l4At AUII-lMT«2flC0 |f«20HA-HAl 


26410 


1990- 0S4I 




1940-0S4I 




UO-VISIBLC tUR-INf*MCO tf«20HA-RA4 


26460 


199>-0S*2 




L990*0547 




AAO-VISUIA UIN-INT-2«tCl> l^a20MA-NAX 


26460 


199O-0S*r 




499^0547 




U0-VISI8LI UIN-IMr-JMCD iF-2aita-HAa 


26410 


1990-0547 




499i>-0547 




ua-vissaiE wat-tNr-2ncD if-zoMs-NAs 


26460 


1990-0547 


A^CMA 


1«90-0»*T 




U0-VlSI6i€ LUN-l«4f*2nCO JF*20fU-4UX 


26460 


1990-0S*r 


AMt 


4990-0547 




U»-VIS1SLE UIN-INI«2MC0 IF-20M-NAX 


26460 


1990-0547 


A2CAH 


1990-0547 




U0-VISIU6 LOI^iNT«2ACO |F*20HA-HAX 


26410 


1990-aS*T 


A^bRt 


t««o-os*f 




U0-VIS16Le LUM-1NT»2NC0 IF*20M-HAX 


28*80 


1990-0547 


A^CHi^ 


ISfO-OSST 




U0-VISIM.6 UJPl-CNT*2nC0 1F»20HA-RAX 


26460 


1990-0S*? 


A^LHit 


1990- OMT 




LED-VI&IM.E tUH-IHT*2NC0 IF>20M-IUS 


28*80 


1990-0567 




1990-0547 




ua-VISIM.E LUH-INT«2NC0 IF-20M-NAX 


26460 


1990-0541 


A2CHU 


1990-OMr 




UO-V]$]6t6 Ul»-lMr«2MCl> IP«20HA-NAX 


26460 


1990-0S*r 


A^LKIA 


499^0547 




l69-VlSm£ lUH-JMr-2HCO |f»20MA-HAA 


26463 


I990-0S*} 




4990-054 7 




LE0-VI514LC Um-|Mr-2MC0 1P-20HA-MAX 


26460 


1990- 0S*T 


A^CKU 


1990-09*1 




U0-VISI6(.e LOR-INf«2ACO IF-20PU-AAX 


26460 


1990-0547 


A^VAlf 


4990-0547 




IED-VIS18LE Um-IHI*2NCa tf«20M-NAX 


26460 


1990-0547 


AiloAlR 


1990-0547 




L60-Vism€ UPf^lNT*2HC0 1F-20HJ^HAX 


26460 


1990-0567 


A^bKl9 


4990-0547 




Lt»*VISIM.E IUH-INI«2IIC0 iF«29H*-HXX 


28*18 


1990-0947 


A^bRkt) 


1990-0S4T 




LE0-VI5I6LI LUFI-INT»2nC0 iF«20NA-IUl 


26460 


199Q-Q567 


A^btui 


1990- 0>*> 




Lt»-VISI8LE IUI^IHT*8IIC0 IF-20U-HSX 


26460 


1990-0567 


4^h.K«A 


499U-U547 




UO-VISIM.E tun-INT*2HC0 IF-2IMA-NSX 


26460 


1990-0547 


A2UH^J 


I99U-099T 




UO-VlSaOLE LUP5-1NT*2NC0 |F«2QHA-HAX 


26410 


I99O-0S4T 


A«wH^A 


4990-0547 




LE0-V4$I6LC tUH-lNt*2MC0 IP-20IU-RAA 


21460 


I990*OS*T 


A^blxS 


4990-0547 




LEa-VISIBLC U>H-INT*2nC0 IF-20RA-HAX 


26460 


l990*0S*r 


A2C«U^ 


1990- 0S*f 




Ufr-VlSltL6 iUH-UT«2nC0 IF«20PIA-HA| 


26460 


1990-0567 


A^.iur 


4990-0547 




U0-VISI8LE LUN-INT*2RC0 IF-20U>NAX 


28*80 


1990-0567 


A^bA^A 


1990-0547 




U9-VJ$aiLE LUPt-INf«2MCD 4F*20HA-MAX 


26460 


1990-0S*r 


A^bM24 


1990-0547 




IE0-V4$lt46 tUH-lNT»2MC0 tf«20MA-RAX 


26460 


199O-0S4F 


A^bMiU 


1990-0547 




LES'VISIKE um-SNT>2nCD IF-20IU-IUX 


26460 


1990-0547 


A^CK^i 


1990-0>*7 




AEO-VIS46I.E UJI»-lHf*2HC0 ]f«20HA-RAX 


26460 


1990-0967 


A^» 


4990-0547 




L6&-Vl$lM.e I0n-JNT*2HCD tF-20«A-RAX 


28*80 


1990-0547 


A^HJl 


1990-0547 




UO-VIS44LC LUN-SNf«2nCa lf*20llA-HAX 


26460 


1990-0S*? 


A^bAiA 


1990-0>47 




U0-VlSiac( LOH-lHr«2Ma) IF«20HA-HAX 


26463 


I99>-0S*? 


4^bAi9 


1990-0547 




U9-VISIBLE Iun-1NT-2HC0 1F-20HS-MAX 


26460 


1990*0841 




4990-05A9 




0l5fLA7-MUH 5£0 •5-CMAft «400-H 


264 60 


1990-0539 


A^JiA^ 


49SO-0540 




01 SAL AY- HAN SCO 1-CHAA *45-H 


28*80 


1990-0540 


A^JoHA 


1990-0540 




OISFLAT-NOM SCO 4-CMAA .4J-H 


26460 


1990-0540 


A^O^A 


4990*0540 




Di$?LAY-MUN SEC i-CHAA .Ay-H 


28460 


1990-0560 


A20^H9 


4 9 90-0540 




OISPLAV-NUN SEC 4-CHAA .Al-H 


26466 


1990-0960 


A2i>»N4.DSAA6 


4990-0540 




9IS9LA7-NUH SEC 1-CMM »4>-H 


26460 


1990-08*0 


A^l 






NO FART NUWOER.'SEE A2WI 






A2n 


12SI-4340 




CONNECTOR t6-PiN f POST TYPE 


am* 


23-01 2161 




IKI -}*?« 




CONTACT-CONN UANt POST TYPE FEH CRP (P/0 P2I 


2S4S0 


1351-3476 


A4<1 


J6 Ai-2045 




atsisrext 20g S« .2Sa FC TC— *ao/*8» 


01121 


C62015 


A4n2 


06 5^2^15 




XESISIOa 220 SS .25K FC TC*-*00/*600 


01121 


C62219 


A{H$ 


04 03-2^45 




XESISTOa 220 SI FC TC— *«0/*«00 


01121 


C8221S 




04K5-3j25 




XESisroa a si .2Sii fc rc— *oo/*soo 


OU2t 


C6J509 


A^K9 


o*a}-ssos 




XESISIOI )S SI .2S8 FC TC*-*00/*500 


0U21 


CB830S 


A^K« 


0oA>-3JJ9 




atSiStOM 8} SI .2SU FC tC--*DO/*SOO 


01t2t 


C63105 


A^h7 


04U-3M5 




XESISIOK 83 SI .2S8 FC TC— *00/*SO0 


01121 


C6S309 


A^«lt 


gbs>-Jsos 




XESiSfO* 88 SI .2S« FC IC—*«0/*SO0 


01121 


C8180S 


AtfRV 


06IU-3905 




RLSISIQR 33 5S *254 FC fC«-400/«500 


0U21 


CB880S 


AlmlU 


a»*s-SMS 




R«SUTOR 33 SC *25N FC TC«-400/»500 


0U21 


C8830S 


aAu 


06SA-3A05 




XtSiSIOM 88 SI .2SS FC TC— *00/*S00 


01121 


C88IOS 


A^KU 


l81l>-02;9 




Nttsuax-OES *-PIM*SIP .l-PIM-SPCC 


1128* 


790-61-R330 


A^KiA 


18l0-0»* 




NETMORR-RES 6-PlN-SIF •4-FIN-SPCO 


1128* 


TSO-81-X880 


A^Alb 


I»l0-0<j9 




NAT40AR-RES I-FIN*SIF •1-FIN-SPCC 


U23A 


TS0-8I-X880 


AiKl> 


14 4^0229 




Mtr40KR-IE5 6-PlN-SIP .4-PIN-SK6 


11236 


750-61-1030 


Aa«U 


1810- 0<29 




M4T40RK-RES 0-PIN-S4F *4-FIN-SFCC 


U236 


Tso-ai-ano 


A^«lf Aa 


4410-0706 


2 


N<r60RR-RES i-PlII^SAF *I*FIN-SPCC 


03483 


7EO-81-R10K 


A2A|« Aa 


ltlU-0208 




NEfROKR-RES O-FlN-Sir .l-Flf^>SK« 


02483 


7SO-81-RIOK 


acst-soa 


506O-94J4 


n 


puSrteofroN smitch 


28*80 


80*0-9*3* 


A^«| 


•420-2254 


1 


*U8ie 8SSEIIM.9a OISPLATIINCLUDES PH 


26410 


8120- 228* 


A^«^ 


05455-64604 


1 


CAALE ASSkROUe KtYBOAHOONCLODES F2) 


26460 


03455-6I601 




I 20 »-o*r* 


• 


SJCXEI-IC tb-CONI 01P-8CDR 


26460 


1200-0676 



&« S6€ NOTE ON SCHEMATIC 10 Introduction to this section for orderioc Information 





















Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




Ji4$V6A>03 


1 


AbC* ASSEMtflV, SAOCLSSOA 


29A90 


09*99-6890} 




034BS-8tS03 




REBUILT EXCHANGE ASSEMBLY 


26400 


03499-88903 


AXi 


OLAO-0.<10 


y 


CAMCIIOK-FIO 1.3UF6-20I I9V0C lA 


9629* 


1500315X001 5A2 




0L«0-a^LU 




CAPAU IOR-F«l> 3.3UF4-40S I99X lA 


56289 


15003 J5XOQISA2 


Aaci 


>)l«e-04ld 




CAPACIIOR-FXO 3.3UF*-20( I9V0C tA 


S62B7 


LSO0335XO0I 5A2 


AiAl. HI 






Acbisrut 2K 14 .USH r rC*Ue*LOU 


246*6 


C4«1/8*T0'200L*F 


A3Ki* 






MOOING LIST 








ofm-ilii 


A 


RlSUIdi 6.6U IS .149M f rC-OF-lOOIS.OVI 


24646 


C4-I/8-Y0-464L-F 




OAM-AIAI 


1 


RE9UIUK 2.67k is .1496 F rC*0»-100l4.»V) 


24646 


C*-178-TO-287l-F 




JAVe-OUAi 


1 


RESmUR I.96K IS .1496 F IC-OF-100I4.0VI 


24646 


C6-l/a-T0-l*61-F 




•ih AA2A 


1 


AtSUfUA I.A7K U •L2)M f fC*0*-|0«3.6VI 


24646 


C4-l/l*rO*ll71-F 




U?S7-IIa«0 




HL9I9IUR IK U .1496 F IC*0*-100 I3.0VI 


24646 


C4-I/8-TD-1001-F 




()6W-A70U 


i 


RESiSTn 719 14 .1296 F IC-0»-100(3.6VI 


24646 


C*-l/8-tO-7l9R-F 




U7S7*04IA 


1 


RtllSIW 911 14 .1496 F IL«U>- lOOQ.OVI 


24944 


C4*1F8-Y0<'5UA*F 


AiJi 


Lb20-i2Ui 




IL-OIOIIAl 9N7M.S06N TU LS UUAO 2 ANU 


01199 


SNT41S0BN 


AiOc 


L«20-UUL 




It-OlbllAl SN74LS09N tU AS OOAO 2 AND 


01299 


&N74L&08N 




LttZO-UVA 




U-OieilAA S676LS01M 7U AS QUAD 2 NANO 


01299 


S67*IS03N 


• AJA 


LA20«ii99 




IC-OICirAl 9N7HS06N III tS MEK 1 


01299 


SNT41S0*N 


AiU9 


t«20-U9> 


1 


IC-OlCtlAL SH76AS179N TIL IS UUAO 


01295 


SN74LS175N 


A9ue 


LAiA«02AA 


1 


«K» AOH-MOS 


29490 


1919-0246 


AAUr 


leL6^02»> 


1 


•IC> MOH-MUS 


28400 


1919-0245 


Ajja 


L«l«-U2oA 


1 


eJCe HOMOS 


29480 


1919-0244 


AAU9 


1840-14.91 


4 


IL-OICITAL Md> 


28480 


1920-1494 




A040-0/AA 


A 


SlIHACrUH^PC 90 BU ^U.TC «0«2*eO*rHltNS 


29480 


4040-0749 


ALU 


0J*S>-eSS10 


1 


r.C* *SS€ULT» INOO Hb 


29490 


03455-44510 


AiuCl 


0160-4479 


1 


CAFACnOR-FXO 220FF »-10% 


2S480 


0160-4479 


AiJC^ 


0460-2497 


A 


CAP4CiruA-F40 iOPf e*>9 >OOaVI>C CCA 


28480 


0140-2257 


AluC) 


UL«0-AAb» 


A 


CAPftCirOA-flO iOOPf »>104 lOOOHVM CCR 


29490 


0140-1444 


Ac 


0440-0199 


2 


CAAaCir0A-F40 6600AF LOS 20i> VOC POLVE 


28460 


0190-0199 


AiUCS 


OLAU-ULAA 


1 


CAP4CirOR-FXD 220PP *“9g A009VK NJCA 


29490 


0140-01 34 


ALUbO 


0190-0071 


2 


CAFAtlfOA-PXO 400PP ^Sl L300tfVOC CCA 


29490 


0190-0071 


Atdl.7 


0|9(K0u71 




CAPACItOA-PXO 40UPP *~6t lUOOMVOC CCA 


29499 


0150-0071 


Aiuca 


QlM-iUm 


u 


CAFaCirOA-PAD iUP«-204 $OVOC fA 


5A280 


15001 05 X00S0A2 


ALUcS 


0190' 02AU 




CAPACUOA-fXO 1UF4-20S >OVOC TA 


66269 


1900109X0090*2 


AldbU 


OlAO-0229 


A 


CAPACifUA'-PxO yyUF^lQt lOVOC 7* 


66269 


1500134X901062 


AluUtf 


04110-0147 


2 


CAPACltUA'PXO lilP W04 2MV0C CCA 


29490 


0140-0127 


ALUCiA 


OlAO-l^A 




AAFACI lOa-FXO lOOPF F-IOS lOOOaVOC CER 


29490 


0140-1444 


AIJAi* 


Oil^AAAA 




CAPACJTOA-FaO lOOPP «-|JS lOOOHVDC CCA 


29490 


0140-1444 


A10U9 


01«0'2AU6 


2 


CAPACIIUR-FKO 27PF *-9t 10U6V0C MICA 


29490 


0140-2104 


AlUUU 


OlAO-0209 


1 


CAPACUOA'fXO A7PF 500HVOC HtCA 


721J9 


0M15947020500lfVlCA 


AlUCIf 


0i«4^220A 




CAAXCLTOA’PXO iOOPP iaOHViX MICA 


28490 


0140-2204 


ALUbLft 


OL«*^O^iO 




CAPACIfOA^MO IUPW09 90V0C 7 A 


9628* 


I900I09K0090A2 


ALUUL9 


OlA^O^JO 




CAPACITUR-FXO IUFP-20S 90VOC lA 


9628* 


1900109X0090A2 


ALUL2L 


UlAO-4441 


1 


CAPACIfOA’PXO iSOAf e-2«5S i6UHm P<M.VP 


29490 


0140-4441 




0140-4497 




CAPACJfQA-fXD lOPP ^54 9J04VOC CCA 


28490 


014>2257 


AluUA 


OIALHOISA 




CAPACITUA’PXO 2200AF »«104 200HV0C POIVC 


54299 


292P22292 


ALUW^A 


0160-2106 




CAPACiroft-fXO 27PF «-94 3iM»V0C MICA 


29490 


0140-2106 


ALUC^> 


ui eo-oi9s 


1 


CAPACIlOH-PXi> .i3Ufe-20S 3SV0C fA 


542 69 


1500314X003 5 A2 


AlUL^A 


uLAo-^eAr 


i 


CAPACIIUR-FKO .OIUF AlOO-US 906V0C CER 


28*80 


0140- 1847 


*tUL2/ 


Ul«0-39Ar 




CAPACI7UR-FK0 .OIUF MOO-OS 906VUC CER 


29490 


0140-3847 


ALUb^a 


01«l>-01l6 




CAPACnaA-fXD |OUP*-t04 2uroc fA 


54299 


1500104X902082 


ALUCiV 


OUpO*2U*»> 


16 


CAFACIIOR-FXD .OIUF F80-20S I006VOC CER 


28*80 


0160-2055 


AiJLAL 


Oi«0*2U» 




CAFKCIIOA-FXO .OIUF P80-20S IdOOVUC CER 


28*80 


0140-2055 


AIJLA^ 


OLiMKiWAU 




CAPACI70A-fX0 iUFe*204 >OVOC 7A 


9628* 


19UD109X0090A2 


ALuCiA 


UioO-3e47 




CAPACJfOA-PXO •UtUf »10U*U2 6<ftt¥0C CCA 


29410 


0140-3847 


ALAtiS 


J 160-0^ At) 




CAPAClfQK*FXO lUF»*20t 90V0C fA 


54299 


1900109XOD93A2 


ALUUA 


01«U-2v^» 




CAPACI lUK-FXD .OIUF *S^2US lOOaVOC CER 


28480 


0I8D-2999 


ALUUaA 


i)4M>-2U»3 




C4P4UfUA'PX0 *OIUP »aO*2a4 lOOHPOC CCA 


28490 


0140-2055 


ALUVJ7 


0160-2099 




CAPACnUA-PXD .OIUF »9J>2U4 LOOHVOC CEA 


21410 


0140-2055 


Aiuu>a 






C4PACnOA*rXO -Oii» HIO- 20 S toouvoc cca 


28*80 


0160-2099 


ALUbAA 


ULAU-2USb 




CAPACI TQA-PXtl ,aUtf »eO-204 lOOirVDC CEl 


28*80 


0140-2055 


ALOCAL 


Ulu>-2V5» 




CAPACItUA-FXO *0109 ♦iU-2U4 lOOMVOC CEA 


29490 


0140-2055 


ALUwA^ 


0160- 2U99 




CAPACI tOA-PXO •UiUF •90>204 lOiMVOC CEA 


20460 


0140-2055 




UL«A«2g9> 




CAPACI lOR-FAD .OIUF 69U-2U4 1006VOC CER 


28*80 


0140-2055 


ALUwAA 


dL«U-iA»9 




CAPACJ70A*FX0 lOOPF P-IQA lOOOHVOC CCA 


28480 


0160-9*66 


ALAbAS 


0L«U-02i0 




CAPACIIOA-FIO 1UF»>204 90¥M fA 


5428P 


15001 05X005 0A2 


AlUVAo 


UL9&*0229 




CAPACIIOR-FXO 11UF4-I0S lOYK lA 


9628* 


1500334X901082 


AlUAA/ 


J14IK2U93 




CAPACI lOH-^FXO •OiUF »«0-2g4 IU0«V0C CCA 


28*80 


0160-2999 


AiVbAa 


UlM-«UdS 




CAPACIfUA-FXD «OiUF ♦•U'AOA luOHtfUC CCA 


28490 


0140-2055 


AlJtAU 


a 1 




CAPACI lOA-FXD .OIUF *90-204 iOUkVOC CCA 


20490 


0140-2055 


AC SERIAL NUMBERS 


] 622AOI 906 AN 0 ABO V 
1 


1 WiM 

1 


ES 01900199 









Se« Introduction to this section (or ordering Information 



6-1 














Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 








C*r«ciiua-f<o .oiuF •to-2ui loohiroc cto 


20A0O 


0100-2055 




g|«^2At>s 




ClVACItUK-FjlD .02ur •«0-20( 2SHV01 (fil 


28*80 


0160*2605 


AiOOJ 






CA0AC1TU0-FXO .D20f A0O-2OI 29HV0C CEA 


28*80 


0160-2605 




jtao-o/eo 




CAPACIfU0-FAO 1UFA-20C 50V0C TA 


»*289 


1500105XOD53A2 


AI0b3» 






CAPAClfUA-FXO lUF A-20I 2So90c CEi 


2OA0O 


0180-0122 


AUU>» 


oia>-i>d.AO 




CAFACITO0-fXO lUF*-20f 50V0C lA 


98289 


I500105I0050A2 


Aigu>/ 


0llAH2»2A 


2 


CAFAClfOA-FXO 220 UFa 50-I0X 50V0C Al 


20A0O 


0180-2828 








CAFACJfOA-FXO 220uF»5O-l0* 50V0C AL 


20A09 


0100-2620 


A1 


omo-tuiu 




CAeACIIW-FXD 1UFA-20X »0«OC lA 


56209 


15001 05 X0050A2 


Aigg(»i 


gl«0-UA91 




CAPACIIQA-FXO tOOOUF«9l>-ia« fbVIK AL 


0022D 


25V8SUOOO 


klM4 






CAMC11O0-FXO 10000FA50-104 25V0C AL 


00229 


25V05L1OOO 


AIUU6J 


iJ 




CAAACIfOA-FXU 1UF*-2O0 SOVOC lA 


5620} 


1500 105X005042 


AlOLAb 


giA0-9AV» 


1 


OAAACIIOA-FXO 92OOUFLI0O-IOI I2VIK AL 


20A0O 


0100-0695 


AiOLAA 


04*^1)23^ 




LAFACnuA-FXO 1OF»-2O0 50V0L TA 


98288 


15001 05 X0050A2 


• ijua 


I9 0i*0>$6 


0 


UiUJE-ttlN FA* M)V 29NA 10-22 


20A0O 


1901-0988 


AigLM^ 


iVgl«0»AA 




OlOie-OtN Fxr MV 2»HA TO-22 


20A0O 


(901-0988 


AidO(> 


i90J*Al«IA 


2 


DIQ06-2MA 5«02V 5< 00*7 F»««AO rC«*.0U« 


15111 


CO 3565A 


AigLAA 


19C4-0I>»U 




OlOOf-WirCHINO IDV 2UiMU 2NL 00-2 


28*80 


1901-0050 


A1JC4> 






DI09E-5MjlC«ilfW 00V 200**A 4H% 00-T 


20A0O 


1901-0050 


AiUleAA 


i9gi*oa>9 




Oluae-MlITCHillO ISV 200HA 2H$ 00-2 


20A0O 


1901-0050 


eiJkfcf 


19O2-0UA 


» 


DI30E-2NR lt>.2V «X 00-2 TO'. AM rC-*>0Mt 


OA713 


S2 10939-2*2 


AiJtAA 


lAoi-oavg 




OI950-3H1TU41W 00V 200MA 2A5 00*7 


20A0O 


1901-0050 


AIjCh^ 


ItiU-uie* 




0C0DE-2NA 16»2V 50 DO-7 PO««AM 7C*»«0AAI 


0*2W 


$2 10919-2*2 


AlJLMii 


l9C2-0i«A 




OI30E-2NR 1A.2V 9X 00-2 F0*.*M TCx.OM* 


0A7U 


S2 (0939-2*2 




tsai-ousd 




DI93E-5VlfCHlMC 00V 20DAA 2MS 00*7 


20400 


1901-0050 


AigCxi> 


19 01*0090 




OlOOE-SVlTCNlM 00V 200MA 2H& 00*7 


20AOO 


1901-0050 


AiUbKlA 


1902*3002 


1 


OiOOE-MR 2.J2V 9t 00-2 PO>.Ail IC«-.OT*T 


15010 


IB 39928 


AIggAlS 


49U^-0gA9 




D10DE-2MA 6.19V 50 00-7 n>*«AM TC«*.022I 


20A0O 


1902-0049 


AWvKiJ 


190i*0g93 




UiaOE-WIICnlMC *0V 200HA 2H$ 00-2 


20A0O 


1901-0050 


AIUCH17 


1901*0030 




D10JE-SMIICHIM6 MOV 2U0MA 2Ni 00-7 


20A0O 


1901-0090 


A4JC«it 


1901-030A 




DiOOE-MN FAt MV 2»XA 10-22 


20A0O 


1901-9988 


AlsrCAiV 


190l*ObOA 




OlODi-CAN PRf 30V 25MA T|>*72 


20A0O 


1901-0506 


AIOU^I 


19Ci*O90» 




OlOOC-WN PRP AJV 25HA 11^72 


20A0O 


1901-0506 


AtJUt^^ 


19 01-09 A6 




0ia06-0€N PKP 30V 25«U 70-72 


20A0Q 


1901-0506 


AMKii 


i90i*oo>g 




DIOOE-MITCHINC 80V 200NA 2NS 00-1 


20A0O 


1901*0050 




l9U*0v3O 




OiaSE-SHITCHlNO 80V 200AA 2NS S&-2 


20400 


1901-0050 


Ai^CH^» 


19 Cl *0050 




OIOOC-0W1TCM1NO 00V 200MA 2N& 00*7 


20A0O 


1901-0050 


AlJCh£^ 


19Ql-0QSa 




Oiooe-SHIICMIMC BOV 20JNA 2NS 00-7 


20A0O 


1901-0050 


A1JLM^7 


i4a-03r& 


A 


OlOOE-WN FKF 3>V MMA 00-2 


20400 


1901-0128 


A|gU2A 


1901* Oi/A 




OUUE-CAN PRP 35V 50HA 00-7 


20A0O 


1901-03 76 


AiJbA^y 


1902-OiAA 




OIGDE-ZNA 16.2V 50 UO-7 PO-.AP rC»».O660 


0*713 


S2 10939-242 


AiJ«pA>i 


19Q2-01AA 




OIUOE-2MR 1A.2V SX 00-2 FO<.*M 7C«F.0AAX 


OA713 


92 10939-2*2 


AWU(i< 


1901-0050 




DIOJE-SMIICHMS 89V 200HA 2N1 00-2 


20A09 


1901*0050 


AlULAii 


1901*0090 




UiOjE-SMITCHINO BOV 200HA 2N» 00-2 


20A0O 


1901-0050 


AlULAM 


I90i-oa»o 




OIOUE-5U2TCH1MC 0UV 200MA 2NS 00*7 


26400 


1901-0050 


AlOLAiS 


1901*0050 




01DDF-5HltCHIN6 00V 200AA 2NS 00-7 


20A0O 


190 1-00 50 


A&0CNi9 


i«ci-oo»g 




UIME-SHIICHIMS 80V 209MA 2NS 00-2 


20A0O 


1901-0050 


aiulaa/ 


1901*0050 




OlUoe-SHlICNiW BOV 2U9I1A 2H$ 00-2 


20A60 


1901-0050 


AlOCHiA 


19gi*0U50 




OIOJE-WIICHINO 8UV 200HA 2N» 00-2 


20400 


1901-0050 


AiOCHiV 


i9Ci-ow»a 




l>IUOE-SMITCHi>(C BOV 20UHA 2NE DO-2 


20400 


1901-0090 


AlUCHAi 


1901-0053 




UIOOE-SHITOHINC 89V 20URA 2NS 00-7 


20400 


1901-O0M 


AIUCAA^ 


1901*0090 




OlDDE-SWIfCHlNb lOV 2O0NA 2K5 00-7 


20400 


1901-0050 


AlaAAAJ 


t4Gl-IM>0 




01 DDF -SWITCH tM6 0DV 2DDMA 2N5 00*7 


20A0O 


1901-0050 


AUChAA 


1901-0050 




0i09E-SHiICMlN9 BOV 203NA 2NS OU-7 


28*80 


1901-0050 


AldUAA 


1901*0050 




OIDOE-SaiTCHWC BOV 2U0AA 2N& 00-2 


20400 


1901-0090 


AIvAKAa 


1901*0u5O 




DiOOC-$MirCMIN6 BUV 209HA 2NL 00-2 


20A0O 


1901-0050 


AiatAAf 


1901-OU50 




tflODF-SWlfLHINC 00V 209IU 2Mb 00*7 


28*80 


1901-0050 


AiJCKAA 


1901-0020 




UIOOE-FMA AlCr AOOV 2VDMA 90-29 


20400 


1901-0020 


AUCAAA 


19 01-0020 




OIOD€*PHA HECr AOOV 750HA DO-V9 


20A0O 


1901-0028 


AigCH>i 


1901-0OGI 




DIUOE-MA AlLt AOOV 75DHA 00*29 


20A0O 


1901-0021 


AiaLR)^ 


19CI-OU20 




UIUOE-FMR ALCI AOdV 2iOHA 90-29 


20A0O 


1901-0028 


A|gCH9> 


19U-OO20 




D1O3E-9H0 RACr AOOV 750*16 00-29 


2IA0O 


1901-0020 


A14UAA 


1901-0020 




Oigol-PWR AECr AOOV 750MA 00-29 


20A0O 


1901-0020 


AlgCH9» 


1901-0020 




OIQOF-PHA AEC1 AOOV 75DHA 00-29 


28*80 


1901-0020 


AAUUH9A 


1901-0020 




OlOOE-PMI AECI AOOV 750MA 00-29 


20A0O 


1901*0020 


ilOlioI 


19C1-OW20 




OlOOE-PMA lECT AOOV 750HA 00*29 


20A0O 


1901*0020 


A|gCH>» 


1901-0020 




OIDOE-PWA UCT AOOV 750MA 01^29 


20A0O 


190 1-0020 


AlilAH>y 


1901-UO50 




UI00C-5Wl7CHtf«6 00V 200HA 2H& 00*7 


20A0O 


1901-0050 


AUChoi 


1902-00A9 




0I02F-2MA A.19V 50 00-7 PO«.AW TC«*.O220 


28*80 


1902-0049 


Ait|«.KW 


1901-0200 




OlOOE-FHR AECT lOOV 1.5A 


OA713 


SA10A6-9 


AWCkbA 


1901*0200 




OJQOE-PHA HlCr lOOV I.5A 


0470 


5X1046-9 


AlJtAoA 


1902-01 f6 


2 


9139E-2MA 92.8V 8t OU-lt FU*1H IC*F.0*1X 


0*2t» 


92-11213-119 


AlJAAO» 


1902-UVA9 




UID3E-UA 8 . 19V ii 00-2 F9>.L> IC<*.022X 


20A9O 


1902-0049 


AigtnAA 


19C2-0W9 




OI93E-2NA «7.»V ix 00-19 FO'lM lf*.08>L 


3A713 


52*1121 3*315 






See inlrcxluctlon to Ihit tecllon for orderlnc tnformAtlon 















Table 6-3. Replaceable Parts 



Reference 

Designetion 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


atjuiu/ 


4902*31M 




0I036-2N8 ».*2V 8S 00-7 PU-.*4 IC-«.01*Z 


1861) 


CO 55454 


AiUWMott 


1902- 




0t936-2N9 1M55519 14V 59 90-5H 7C«475I 


04715 


1N55519 


AlOWKO'* 


|9 04-0u>0 




OIOD6-SwUCAiMo 60V 200NA 2MS 00-7 


26460 


1901-0050 


A10CR7). 72 A 


1901-0060 




DIOO€-$WITCMINO 6DV 200WA 2NS 00-7 


29480 


1901-0060 


atjai 


49 70-0077 


1 


•30686 V 97Cf9 


29490 


1470-0077 




• t tO-OuS2 


1 


9146-96* 2«4-OHM/7f •01-UlA 


26460 


0110-0052 


aijji 


1^SI-20]S 




CUHN6C10A-K iOCE 15-CUHI/KM 2-90HS 


71768 


242-14-30-330 


aijj.; 


I2>i-2W3 




CUNNECTOR-PC EU6E 18-CUN1/4UM 2-RQSS 


71795 


252-15-90-500 


AiaJi 


1»I-«IB6 


1 


kUNN6U08-PC EDGE 16-CONT/ROW 2 ROWS 






AIJJA 


12SI-9S2S 


1 


C0VH6CT08 10-91N H 90*1 TV96 


2646) 


1251-4925 




i25i-3iy< 


1 


ClMN6l.rOA 5-91 A N 9061 rV96 


27244 


09-60-1 05112405-0)41 


AiJilt 


0490-0740 


1 


AeiAYS9660 


29460 


0*9tK07*0 




09M-OMI 


11 


9UAV-9660 lA lOOAA lOOOVOC 5VOC-COIL 


26460 


049^ 0465 


AlJAi 


0490-044) 




9kiAV-fl6IO lA lOOMA lOOOVOC 5V0C-C0U 


26460 


049> 0665 


AiUltA 


0490- 0»AA 


4 


ftaar-REEO i* iooha ssovoc 8voc-wii 


29490 


0*40-0*** 




0490- 0i*6) 




6EL4T-R6E0 14 luOU 100040C 8V0C*C0ll 


26410 


0490- 066) 


4|J«» 


0490-064) 




A6LAr-U60 lA lOOHA 1000V04 5VDC-C0U 


26*60 


o*4a-Ok*3 


aiwKf 


04 9O-U664 




R1L4T-AEE0 14 100H8 280V0C 8VOC-COU 


26*60 


0490-0464 


A4UK* 


0490-0664 




AUAT-I(f60 lA lOOHA 250V0C 5V0C-C0K 


29490 


0490-0664 


A&OKV 


0490-0664 




RUAV-A660 lA lOONA 250V0C 5VOC-COIL 


20490 


0460-0664 


atuLi 


91CO-1641 


i 


cull-nto 2*0UH 86 e-48 .18808.37816 


2*22* 


18/2*3 


A10P1 


I76i-a}ii 


1 


CONNECTOR 6-9IN F 90ST TV96 


27264 


23-01 2061 




1261-3476 




CONTACT^NN g/W POST type few cap (9/0 911 


28460 


I261-M76 


AI0P3 


1261-4310 


1 


CONNECTOR 2-9IN F 90^ TYPE 


27294 


22-01- 1021 


AiOyi 


»0(B-7028 


4 


fAAN*ISC08» ffel 


29490 


8066-7026 


AiWM 


6044-7029 




tHANSUtORf F6T 


29490 


5069-7029 


A1JU3 


SOei-7047 


9 


148N$ISiat. FEI KOVAR87 83008 


29490 


6061-70A7 


AiJw* 


8061-7047 




THAASISrOR* 967 AOVAR^F 55005 


26490 


6081-70*7 


aiuo» 


16)9-0309 


1 


TR8II8IS70R-JFEI DUAL N-CHAN O-NOOE 81 


29490 


1655-0509 


AidOb 


19)V0447 


5 


fRAASlSrOft-JEET DUAL N-CHAN 0-N0U6 fO-71 


29490 


1955-0247 


Aiug? 


lasvoon 


15 


IRANSlSTQR N9N $1 9(^)00NM F7«200NH2 


29490 


1954-0071 


AiOUtf 


U))-0O86 


1 


iKAHSISrOR PW SI PI^aiUHH F7>40nH2 


29490 


1953-0096 


Aijy« 


lasi-oiMo 




7klNSlSrOR Pl^ SI PO>3»OH« F7«l>ONH2 


29490 


1959-0020 


AAggii 


19)4-0071 




iRANSlSrOR NPN SI 90-)00HH Fr*200NH2 


29490 


168*-007l 


AiUvi^ 


1994-0097 


5 


IRtaSiStOa NPN 81 PD>3Mna FI-78HH2 


29490 


1954-0097 


AlUwl> 


30 99-7029 




TRANSJSTORa F6f 


29490 


5096-7029 


AijgiA 


S09B-702H 




rHANSISrORf F£T 


29490 


8066-1026 


Aijgi> 


6061-7047 




IIUNSUfOR* FEt KOVARSF 55005 


26460 


8061-70*7 


AiOUiA 


6061-7047 




fRANSiSlOR. 961 KOVAR*f 55005 


29460 


5061-70*7 


Aiguil 


18M-0<t6 


2 


rKANSiSfOR-J96f DUAL N-CHAN 0-NU06 TO- 71 


264 60 


1688-02** 


A1JUI9 


6061-7047 




TRANS ISrORt FET KOVAASF 55005 


29460 


5061-70*7 


Aiggi4 


5061-7047 




IRANS1S70R* F61 ROVARSF 53005 


26460 


5061-70*7 


Aijg^i 


6081-70A7 




l4A*8l8iaR. FE7 80VAA8F 83008 


26460 


5061-70A7 


AiOl^tf 


1656-0420 


11 


Ta4N8l8IQR 2-FEI 2N*3»1 H-CH4H D-MWE 


04713 


2N*34I 


AiOg^A 


1954-0097 




Transistor npn si po«)4oiw ft«75nh2 


26460 


1954-0097 


AiJgSA 


ld$4*0071 




TRANSISTOR NPN ST PD«500M FT«200HN2 


26460 


1954-0071 


atuiMs 


lttM-0071 




TiUiN8l8iaR NPN 81 PO-300IW FI-200HtU 


26*80 


1954-0071 


Aiggi* 


19f)-0020 




TKANSISIOR 9N9 SI POa^OORM 9T-150NM2 


26460 


1953-0020 


aivuil 


19S5-0J69 


6 


IAANSI*T0R J-96T AUCHAN 0-M006 TO-72 *J 


26460 


1688-03*6 


Aiug^A 


1955-0)69 




7<4M8I8U« 3-FE7 N-EK4N D-NJOE 10-72 81 


26460 


1955-0)69 


A40gtc« 


19 55-0)49 




7RtN818ItlR J-FET N-CHAN O-NOOE 10-72 81 


26*60 


1955-0)69 


Aiggii 


1955-0244 


2 


•TRANSISTOR* JF67 N-CHANN6L 2N4657 


26460 


1655-0264 


niogAtf 


1955-0244 




6TRANSIST0R* J9ET N-CHANN6L 2N49S7 


26460 


1655-0244 


Aiogii 


16 55-0420 




TRANSISTOR 2-PET 7N459I N-<KAN D-R006 


04715 


2N439I 


Aigg*A 


1955-0420 




TRANSISTOR 2-PET 2N4591 N-CmAN 0-H006 


04715 


294391 


AiUM3> 


1955-0)69 




ThANSUTDR 9-PET N-CHAN D-N006 TO-72 SI 


26460 


1655-0)66 


AiOgio 


l6 55-0>6» 




TRANSISTOR J-FET N-CHAN O-ROOE TO-12 SI 


29490 


1955-0)61 


Aigg^^ 


18i»-024e 




TA4N8l8rOR-JPtT OUAL N-CHAN O-NUOE I0-71 


26*60 


1955-0246 


AlPOis 


6061-7047 




TUH8l8fOaa FEI K0VA88F 83008 


29490 


6061-7047 


A|Ogi4 


6061-7047 




IR4'<8i8TaRa FEf 8UV488F 83008 


26*10 


8061-70*7 


AiJgAj 


i8:»-0i*s 




TkAN8IST0R J-FET N-CH4N O-NOOE tO-72 81 


29490 


1688-03*6 


AigyAt 


19»-0U20 




Transistor pnp si PO*iOOM Fraisorntz 


29490 


1955-0020 


AUgA4 


4 9 55-0020 




TRANSISTOR PNP SI PO*500Hi« Fr*150NK2 


29490 


1955-0020 


AlPgAJ 


1955-0020 




IR4N8IS70R PNP 81 PO>lO0M FI-I80NH2 


29490 


1955-0020 


AiOgAA 


148*- 0071 




lK«N8l8tQR NPN 81 PO*300Na Fr*200NHl 


29490 


168*- 0071 


AiJg«» 


148*- 0071 




IHANSJSTOR NPN SI 90«)O0Ni FT-200NH2 


29490 


1954-0071 


AiPgAo 


I95i-(W20 




TRANSISTOR 9»^ SI P0-)00*M 9T«150NH2 


294 60 


1683-0020 


AiOMA 


09U-00)2 


2 


RtSI*TOR 50R 5S 5tf P« 1C«04-20 


516)7 


R5-5 


A4gKg 


09 U-VO 32 




R6SJSII* 50R 51 59 PH fC«04-20 


41637 


RS-5 


aluHi 


0499-9737 


12 


RESSSiai iOOR 56 .259 CC TC*-400/«600 


01121 


C610A5 


AIVM4 


0699-9757 




USI8ian looa 86 .28a CC 1C— *00/«600 


DII21 


C61045 


A|gh> 


0b81-1>»$ 


4 


REStSTUR ISA 5i bESN PC TC«-400/4600 


01121 


C61838 


Aig«o 


0644-2**8 


2 


U.8I8I0A 240K 84 .28U FC IC— 400/4600 


01121 


C62**8 


A4aA7 


0695-^445 




86818701 2*06 84 .284 FC 1C— 400/*«00 


01121 


C62**S 


AiWAb 


0 7 57-0446 


2 


AlSISTO) 15R 16 .1259 F TC«0*-I00 


24546 


C*-l/6-tO-IS02-F 


AiJM» 


0757-044* 




RcSISTUR ISA 16 .1259 P K*04-I00 


24546 


C4-1/9-T0-IS02-F 


aiuHii ac 


9*95-1326 


9 


Mii8IOR1JK8t .28N FC Ik— *00/*700 


01607 


C91335 


ac SERIAL NUMBERS 1S23A018WANDAB0V 
i 0 «Odn CA M and CA 7? •dcIv only to sen«l numMfi 1 


V nCPlACES 0883 2036 

e77AU041l sMiboos. 







See Introduction to this section for orderinc information 



6-9 














Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




064^3jg> 




(cSiSTO* ).9K S( .2»M fC IC«-400/*70a 


OUII 


cm7s 


A14A19 


u<.w-«ni 




KeSISfOO iOOH 50 .256 CC TC«-400/46yO 


01121 


C01065 




J4d4«lU19 




nisxsrw loo 5i .256 ft rc*-400/*500 


0U21 


C91015 


4ia«a> 






A16J$I0A ••24 54 .256 fC K*-4OO/*700 


oim 


CM77S 


4IUIII9 






WSISrOR IM >« .2»n FC IC***00/«(0« 


01121 


CS1S3S 


4iaHi/ 


0a«i*2oi» 


• 


OtllSIOR 206 5t .256 fC 7C*-400/*600 


0U2I 


C8701S 


4ivAi« 


06W-4479 


2 


t*K i« .uii r rc>a»-ioo 


2*S*S 


C4-t/0-r0-14O2-F 


4i«»ia^ 


g4M*3U4 




0€5t$l(ll 17.04 11 .WOi f fC«O»-l00 


24546 


C*-l/l-70-17a7-F 


AigA^i 


044>>^2» 




R£6lSrUR 5.60 51 .256 FC fC*-400/»700 


omi 


COSMS 




>)bO-»6jS 




HkSISKM S.61 S( .2»M FC TC-'bM/tTM 


01121 


C8SMS 


4tgHtf> 


oao>-l»i5 




nlSCSrOR 15K 5< .256 FC IC*-400/^600 


Bsa 


CIISSS 


AlJiU* 


Q69e-e777 




MlSI&fURt FIO lOQO OM .0> 


Ktul 


0690-977? 


4igiu> 


06W-44 79 




RtktilO IM II .l2Slt F IC-0*-l20 


Kfia 


C6-1/0-TO-16O2-F 


Aitfiue 


04«>-t«29 




HESISrOO 1.04 51 *256 FC lC«-400/*700 


01121 


C01925 


lujx^r 






lists lOR 220 56 .256 FC IC*-400/«600 


OII2t 


C0221S 


AiUit^a 


J6a»>3l«s 




iiciiiiaa sioK }i .2»it FC u— <oo/**oo 


01121 


C95145 


AiOKc^ 


0494^4737 




KCSISfOR 1004 51 .256 CC fC*-400/«004 


01121 


C91045 


AigRii 


U4a>*iui9 


15 


lUSISfOR 104 51 .256 FC fC«-400/^700 


01121 


C91035 


AiJK4< 


O«03«»<»29 




RESISIOA 5.64 51 .256 FC fC«-400/^700 


01171 


C05625 


AiJKii 


06a3-9il» 




KtllSiai 910 M .2SH FC tC**«00/*«00 


0U2I 


coons 


AlgftiA 


gaee-a/i? 




fUSUfOO 1004 51 .256 CC IC«-400/*000 


0L121 


C91045 


AigHi> 


04 U*>3415 




USISTA 76.0 11 16 66 7CO6-20 


91637 


RS-1* 


AiJHie 


0694-a774 




•RiSIITOKp FlU 10 OHH .OS 


7I4I0 


MO0-077S 


AiOMJf 


06«}-2ul3 




•CSISIOO 20K SI ,2M FC FC»*OO/*S0O 


01121 


CI703S 


Aig«>4 


oeM*a777 




OCSISrAa FIO 1000 OHM .05 


21440 


0699-9777 


AtOK^g 


osw-tri/ 




USISIW lOOK St .2Sri CC IC—*00/*«00 


0U21 


C01O65 


44^*41 


g*U-449i 




WSiSTOR 20K IS .12SH F rC«0F>2S 


0569I 


FHF55S 


AigH«< 


0490-0492 




Resist A 1604 11 .1256 f fC«0«-25 


0366i 


FME5SS 


4lgH4» 


0690-0493 




USISIA 2A 11 *1256 F tC*Oe-25 


03154 


FRE55S 


41 JH44 


0490-0747 




MSISTA 1004 51 .256 CC tC*-6O0/M00 


01121 


coioos 


4igH4> 


060J-914» 




Resist A 514 51 .256 fC TC«-400/4000 


01121 


C99135 


A|g«44 


0490-0777 




4eSIS7A« FXO 1000 OHM .05 


264I0 


0699-0777 


4taH4f 


OOn-3441 


2 


R£sisrtve set* iom/iookohm (iHciuoes R03i 


2ISI0 


0011-3*01 


41i>M4« 


10IO-O&32 




NOTMAR-teS 0-RlN-SIF .l-f IN-SKC 7X100K 


S62I9 


216CH106X9FM 


410H4* 


10 10-0^32 




NFIWOkK-MS (-FIN-SIF .l-PiO-SFCC 7X100K 


56299 


216CN106XAM 


4UM»t 


0e90-O7J7 




R(S1S7A LOOM 51 .25« CC IC—400/«0<H> 


01121 


C9104S 


4iaA»^ 


06 03-2025 




KlSUrOB IK SI .2S« FC 1C— SO0/F700 


01121 


CS202S 


Ali>K»i 


0603-6225 




AeSISTA 6.24 51 .256 FC IC— 600/»700 


01121 


C06225 


AiJR44 


0690-7332 




ROSISrA IM 11 .1256 F IC»06-100 


19701 


MF5Ciy9-r0-lQ04-F 


4iJi<»> 


0690-7332 




RESISIA IM 11 .1256 F tC*0«-10Q 


19701 


NF SCI/ 9- TQ-t006-F 


4iaK»a 


06 03-5145 




R6SISTA 5104 51 .256 FC 7C*-000/»900 


01121 


C95165 




0690-6920 


5 


RESISfA 54 .11 .1256 F TC*0»-25 


03099 


FME 5 S- 1 /0- T 9- 5001 -9 


Aigk>4 


0690-6320 




RESlSfA 54 .11 .1256 F K*0»-25 


03I9I 


FNE 55- 1/9-79-5001-9 


AigK>y 


0693-|l>41 


2 


RESISIA 1004 101 2M CC IC«0M62 


01121 


H01O41 


AtJHAi 


0693-1041 




ReSISrOK lOOK tos 2U CC IC-OFOS2 


01121 


H01O61 


AigA4^ 


0690-0737 




RESlSfA 1004 51 .256 CC 7C»-4OO/«IO0 


01121 


C01O65 


AigH4i 


OOU-3461 




USISriVE SET, 10<Vil>0K0HI|l|INCLU0ESM7l 


20490 


0011-34 61 


A10RO4 


0690-077 7 




RSSlSfA* FXO igOO OHM .05 


20490 


0699-0777 


4iJM» 


0603-7535 


1 


RESlSfA 754 51 .256 FC 7C—600F«900 


01171 


C07US 


AtOH46 


2100-3303 


1 


ReSISIA-fRHR 50 101 C 70R-A03 1-fRN 


73150 


72-101-0 


41 JK4? 


06 09-2025 




USISKB 2K SI .2SU FC tC— M0/*700 


01171 


Ce2Q7S 


A1044* 


969a-»m 




RcSISICn 1001 SI .2SH CC 7C— 400/PIOO 


QU2I 


C91065 


AluMar 


0757-0465 




4ESISIA LOOK 11 .1256 F 7C«0*-100 


24566 


C6-1/9-70-1003-F 


41^471 


0757-0445 




RESISIA LOOK 11 .1256 F TC*0«-100 


24546 


C6-1/0-TO-1OO3-F 


41J«74 


0603-2015 




Resist A 200 51 .256 FC rc—400/»600 


01 U1 


CB701S 


4iOH7A 


0757-0460 


1 


RtSISIA 61.96 11 .1256 F tC*04-100 


24546 


C6-1/9-70-6192-F 


AlgM74 


06 03-4 725 


e 


AtSISIA 4.74 51 .256 PC fC«-400/*700 


01121 


C0072S 


AI0K7a 


0603- 1035 




RESIStA IM 51 .256 FL IC«-600/«700 


oiin 


CB1035 


4IOH7a 


0663-2035 




RtSJSfA 204 51 .256 FC fC*-600/»400 


oiut 


C92035 


4|g47r 


0663-4725 




RESIStA 4.74 5S .256 FC tC*-6O0/*7OO 


D1I7I 


C94725 


AiUHtA 


06U-4725 




RESISTA 4.74 51 .256 FC fC«-400y»700 


01121 


CB472S 


AiUil7» 


oms7i7 




MSisrok FXD 1000 ohm m 


28400 


0888-8777 


4UK4I 


0083-2035 




lUSISIO* 2K B« 7SW FC 7C*4<XV*«0 


01121 


C8202S 


A1UK»< 


0663-9145 


1 


USISrOR 9101 SI .2Sb FC TL— 100/*900 


01121 


CI01*S 


Aig««i 


0690-6737 




4ESISIA lOOR 51 .256 CC 1C*-40O/*t00 


01171 


C8I0*S 


A|gK44 


0603-1035 




MSISIOK lOK SI .2SH FC IC— «00/«700 


01121 


C91035 




06 90-0737 




RESISTA 1004 51 .256 CC i;*-400/*600 


01121 


C01O45 


A1Uk4«» 


0696-0777 




RESISTA* FXD lOOO UHM .05 


29490 


0699-0777 


41 JkctI 


0696-6777 




AESISTA* FXO 1000 AM .05 


29490 


0690-0777 


• tOxM 


ubft>-»ns 


2 


RESISrOK SIO SI .2SM FC IC— S00/F600 


01171 


CBSllS 


4lUM«g 


0603-5115 




RESlSfA 510 51 .256 FC TC--400/4600 


01121 


C05115 


AlgK»l 


J603-2O35 




HESISIA 204 51 .256 FC K*-600/*600 


0U7I 


CB203S 


AUAn 


0643-2035 




RiSISIOR 2UK SI .ESR FC >C— 400/*ROO 


01121 


C92035 


AlJKf^ 


06 63-302 5 


4 


RISISIOR 3K SI .2SM FC IC— ROO/F700 


01121 


C6J025 


41^444 


0 6 03-202 5 




HeSISfA 24 51 .256 FC fC«-400/»700 


01121 


C92025 



See introductiOQ to this seelion for ordering information 



«-IO 
















Table 6-3. Replaceable Parte 



Reference 

Desigrtation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




0«ci-20i» 




USIS7Q6 200 31 .2»V FC TC— *00/*4e0 


61121 


C82019 




0AU-2OIS 




USlSfOR 200 9t *298 FC 7C*-400/460C 


01121 


C62U3 


AiOfiyr 


B4BV202S 




RESlStOI 26 S6 .2M FC IC— *00/»700 


0L121 


C62023 




0»g>-2CD« 




MVISriK 2K S6 .296 FC 7C*-*00/*700 


01121 


Ci2029 


AIW9 


oaee-«777 




8ES16iai FXO 1000 OHM D6 


2B480 


0606-6777 


A10R10V Rt02 


06B3-3O3S 




RESISTOR 206 » 2SW FC TC— 4aa/«600 


01121 


CB3036 


A10R103 


0683>472S 




RESISTOR 4.7K i% Jtm FC TO- -40IV*6aO 


01131 


C64726 


At0Rt04 


(MS- 1336 


1 


RESISTOR 136 n 3SW FC TC-~40n/<600 


01131 


CB1338 


Ainiw 




1 


FAOOING LIST. (fVO 03466-62601) 








OtM 3?M 




RESISTOR 7476 IK.I26W F TC^— lOOtSOVI 


24S46. 


C4-I/B-T0-7B7I-F 




oe6e-M7 


1 


RESISTOR 8.0IK IK .129W F TC«O^IOOMSV} 


24646 


C4-1/B-T0-604R-F 




0767-OA37 


\ 


RESISTOR 4766 IK .I2M F TC-«7.^IOO(-XOV) 


24646 


C4-1/B-T0-4761- F 




0767e^A» 


2 


RESISTOR 3426 (K I7SW F TC-4H-10OI3.8VI 


246*6 


C4-1fl-T0-3*21-F 




0767-0*33 


3 


RESSTOR 3326 IK I7SW F TIHVirTOOM.OVI 


24646 


C4-I/B-T0' 3321-F 




cm «*w 


1 


RESISTOR 246 IK .12SW f TC4--100I44V) 


24646 


C4-1/K..TO-2S0I-F 




0«M-31H 


1 


RESISTOR 2376 IK .12911 F TC-0*-IOa(-40VI 


34948 


C4-1/K-T0-237I-F 




0797>02rA 




RESISTOl 1.216 IS .12>6 F IC-0--100 


24964 


C6-1/8-T0-I213-F 


AidKiur 


OA 89*2029 




RESISIOI 26 SS -2SU FC rc*-*00/*f00 


WTM 


CI2029 


AimOA 


OAAi-4729 




RESISr 06 *.76 31 .236 FC tC— *00/*700 


vt m 


CI4I29 




06C3-4726 




RESISICM *.76 3t .23H FC CC—*00/-700 


WJm 


Cl*723 


A10R11I -lA 


0683>47» 




RESISTOR 4.76 SK 3SW FC TC--400/-700 


KI E9 


C6472S 


Alkl^t Ag 


0AW-0AO2 


1 


SHI rCH-NA8 REEO FUW A JVA 1200V CONT 


21680 


049>^0802 


Aigu 


9100-0678 


1 


T64NSF6RM1*. FtM.SE 


28680 


9100-0478 


AiUU 


9100- 3k7« 


1 


IRAIISFANER. fULSE 


26**0 


9100-M79 


AlOUl 


1826-0A69 


2 


IC nc i*3*C OF AMF 


0*713 


nci*»*CC 


AlUU^ 


1826-0109 


2 


IC »U 2629 08 ARF 


28680 


1828-0109 


AiJUd 


1624- OAO* 


1 


1C LF 399 08 AA8 


2701* 


LF333H 


AIUUA 


1626-03A7 


» 


IC* J C0R8UIER LR339 SPEC. 


28480 


1*76-03*7 


A10U9 


1826*0i4r 




lit 3 COHFUIER IH139 4FEC. 


28490 


1824-0347 


AigM 


1624-03*7 




IC* 4 COMPUTER LN339 SFECo 


28480 


16 2 6- 03*7 


AIUU7 


1624-0*71 


1 


IC OP AMPLOW ORiFT TOM 


02160 


0PO7CJ 


AIJM 


1624-03*7 




IC. J COPtPUTER LR339 SPEC* 


28480 


1124-0347 


A4«»U9 


1826-0967 




IC. 2 COMPUTER LPI339 SPEC* 


28480 


1*76-03*7 


AlUUU 


1820-1196 




IC-OIOITAl SH7*LS17*N TTL IS HEX 


81299 


SN76LSL74M 


A1UU12 


1820- U96 




11-0161144. SH7*IS17*H 171 IS HEX 


01293 


SN76LS174N 


AiOtilA 


1820-1198 




IC-DIUTAI SN7US174N TTL LS HEX 


01299 


SN7*ISI 7*N 


AijgiA 


1820-U16 




IC-DUITAL SM74LS138N TTL LS 3 


01299 


SNI*LSI36N 


Aiug&9 


1820-1196 




JV-0I81XAU SN74LS174M TfL LS HEX 


01299 


SN76LS174M 


AiUUlA 


1620-1196 




1C-0I61T4L SN7*L$17*H TTL IS HEX 


01299 


SN76LS174N 


A&guil 


18^0-1196 




ll-OICIIAl SN74LS174N 111 IS HEX 


01299 


SN76LS1 74N 


Aluulb 


1826-0147 




11 HC 1*36C » 4RP 


04713 


HC1434;8 


AidUi9 


1820-0671 


6 


IC-D161TAI SN7*06N tlL HEX 1 


01299 


SN7406S 


AiUMI 


1820-1197 




1C-0ICI76L SN7*ISOON 7U IS 9UA0 2 MANS 


01299 


SN74L SOON 


AiOiM^ 


1820-1199 




IC-016ITAL SN74LS04N TIL LS HEX 1 


01299 


SN74LS04N 


Aigg<> 


1820-1420 


2 


IC-OISITAl SM741S92N TtL IS OIV-X-12 


01299 


SN74LS92N 


AioUcA 


1820-0471 




IC-0I61TAI SK7406N III HEX 1 


01299 


SN7406H 


AlOtMe* 


1818-2270 


1 


U* MU9-R0M 


28480 


1818-2270 


AIJU<» 


03466-B260I 




NANOPROCESSOR ASSY INCLUDES A 10R 106* 


28480 


0346$-6290l 


AiJlMl 


1620-1198 




lC-3lblTAL SN74LS03M TTL LS OUAO 2 NANO 


01293 


SN74L S03M 


Aiag^g 


1820-1199 




IC-0I8ITAL SN74LS04N TTL LS HEX 1 


01793 


SN74LS04N 


AlgU29 


16 70-1197 




IC-0I6II41 SN7*IS00N TIL IS 0U4D 2 MAMO 


01299 


SN74LSOON 


AiJOil 


1820- 1420 




tC-DICII6l SN7M.S92N III IS OIV-X-12 


01793 


SM74LS92N 


AWUi< 


182^1112 




1C-016ITAL SN74LS74N TTL LS DUAL 


01793 


SN74LS74H 


AiOUi> 


1820-1112 




IC-016JIAL SN74LS74H TTL LS DUAL 


01299 


SN7*IS7*N 


AiUUiA 


194^0677 


2 


OPIO-tSOLATOi LED-POIO/XSIR IF«50HA-HAX 


28480 


1990-D977 


A1JUA> 


1990-0677 




OPTO-JSOLATOi LED-POlU/XSTR JF-SOHA-MAX 


7***0 


1990-0S77 


Aiguia 


1826-0190 


1 


1C V RUT8 


27014 


SL2«ea3-24 


AIOU>/ 


1826-0299 


1 


IC V R6LTR 


7701* 


LIA320T-34 


A|gg3A 


1824-0386 


1 


11 7613C V ROlTR 


03237 


761SUC 


AkJgA9 


1826-0277 


1 


IC CM 320 V RGLIR 


2T014 


LM320I-13 




120^0109 


4 


Hfll S1N6 SCI IO-220-F6C 


28480 


1703- 03 09 


Aig«i 


ag49V-6l607 


1 


CA6LE ASSEHSLVt L.i.HNClUOES FI) 


20400 


03499-41607 


A|g«2 


03 499-61608 


1 


CASlEt 10/1 OlVIOER 


28489 


03*33-61*00 


AlUAl 


1200-0666 


1 


SUCXEI-IC *0-C(WT OIF-S106 


OOtlJ 


A-23-20307 


AIJTl 


0410-0663 


1 


C67SIAL. 0U4RI2 46IS300IIH4 


20**0 


0610-064) 




9060-0170 




CUJDEiPLUC-JN PC ftOARO 


7**60 


9040-01 70 


AUAC 


11T77-68S01 


1 


ASSEM61V. REFERENCE 


28483 










NOT FIELD REFAIRABIE. 












REBUILT EXCHANCE ASSEHBlV 








11177A 




REFLACEUENT ASSEMBLY 






AA RESISTOR t 


10R1I1 AFRLIESONIV 


TO SERIAL 


NUMBERS 1S22AC041 1 ANO ABOVE. 






Am RP^ri9W»rrH Aimt APPI iPSONLVTOSCRIAL NUUeCRS 1622AOO«10 and below. 






AC RERLACEWITHATOASSEHSIYRART NUMBER IIITTBFOR RERLACEUENTOR EXCHANGE. 
1 1 1 







See Introduction to (hi* Mction for ordeHtw Information 



fril 












Table 6-1. Replaceable Part»|Cent'd) 



HP Part Number 



Description 



0J46S-C6612 
0180 0230 
0180 OIM 
0160-0182 

1901 0060 

1902 0777 
1901 -0060 
1901-0036 
1902 3136 
1901 0060 

1866-0747 
1663 0020 
1864 0087 
1664-0079 
1866 0247 



PC ASSEMBLY. OHM CONVERIOH 
CAPACITOR rxO lur>-2<7<(50VDC TA 
CAPACirORFXD 036UP* KK2DOVOC 
CAPACITOR FXD 4700Pf '-lOk 200V DC 
OKWE-SWITCMING eOV 200MA 2*(S DO 7 
DI008 2NR ineTS 62V 66 00 7 PD>26W 
DIODE- SWITCHING 80 V 200UA 2NS DO 7 
DIODE-HV RECT 1KV 600WA 00 29 
DIODE -ZNR 826V 66 DO-/ P0-.4W TC-*063% 
DIODE -SWITCHING BOV 200UA 2NS 00-7 

TRAKSISTOR-JHT DUAl N-CHAN 0 MCOE TO 71 
TRANSIStOR PNP SI POOOOWW FT-160MH2 
TRANSISTOR NPN SI PO«360MW FT*7SMHZ 
TRANSISTOR NPN 2N3430 SI TO-6 PO«1W 
TRAhSiSTOR-JPEr DUAL N-CHAK D-UODE TO-71 




0883-1116 
0883-4326 
0767-0068 
0883 2736 
ceee 44S8 

0898 4702 
0767- 0442 
0683 1236 
0883 4716 
0863 2426 
0883 3036 



RESISTOR 110 56 26W FC TC- -400 -800 
RESISTOR 43K 6% 25W FC TC'-ADO'-TOO 
RESISTOR IW Ik 6W P TC-0< 100 
RESISTOR 27K Sk 2SW FC TC- 400 -800 
RfSISTOR 1.I3K t« 12SW P TC-D- ICO 
RESISTOR 6 87K Ik I26W P TC-O--I00 
RESISTOR >0K Ik I26W P TC-0- tOO 
RESISTOR 17K 6k 76W FC TC- 400 *800 
RESISTOR 470 6k 26W FC TC- 400 -800 
RES'STOR 2.4K 6k .76W PC TC- 400 -TOO 
RESISTOR 30K Sk 2SW PC TC- 400 -800 



0888 3461 
0883 7736 
0767-044? 

0883 4336 
0663-1636 
0683 1236 
0883 1126 



RESISTOR I33K Ik 126W F TCx-100 
RESISTOR 27K 5k 26W FC TC— 400-100 
RESISTOR 10K Ik I26W FTC-0--100 
RESISTOR 43K Sk .255 FC TC- 400 -800 
RESISTOR I6K 6k 26W FC TC--400.I800 
RESISTOR I2K 6k 26W FC TC>- 400.-800 
RESISTOR ■ IK 6k 26W FC TC* *00.*700 



■lA SEEN07E0NSCHEUATIC4. 
-IB SEENOTEONSCHEMATIC4. 



Mfr Part Number 



03466-66612 
I6001D5X0090A2 
0180-0164 
0160 0167 
1901 -0060 
114879 
1901 0060 
1901 0038 
SZ 10938 168 
1901-0060 

1856-024/ 

1863 0020 

1864 0087 
7N3438 

18S5-0247 

C81I16 

CB4326 

MF7C1.2 TO 1004 F 
C8273S 

C4-1/8-T0 1131 F 

C4 V* 10 8871 F 

C4 t«-r0 1002 P 

CBI236 

C847I6 

C82426 

C83036 

C4 l'8-TO 1333 F 
C82T36 

C4 18 TO- 1002 F 

C84336 

CBI636 

CBI236 

C8H2S 


















Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




OT AO- 0009 


1 


USISfOR lOOR 29 IM HO TC«06-200 


IISOZ 


R632 


*^211 


9100-0679 


1 


tAA6S2aiMeA» AULSC 


28680 


910^0679 


Al^Ul 


1020-0223 


2 


10 AN 301A or AMA 


27018 


1H301AN 


kiilU 


1A20-022) 




1C LA 30IA OF AHA 


2T016 


LM301AH 


Alt 


03A5»-'M913 


1 


6*C« ASSEMILY* AC CONVEMER 


28680 


038SB-88B13 


«1*CI 


0160-2199 


6 


CARACIfOR-fXO 30#F «-S9 3006V0C MICA 


28610 


0140-2199 


AitU 


01AO-AA06 


1 


CAFAClfOH-FXO •19UF 6-109 lOOVVOC 901 fF 


28680 


024&-66C6 


AliCt 


OlAO-AAOl 


3 


CAFACirCM-riD .oil# »-iO« iooavoc MCTf 


28610 


0180-8801 


AliCA 


010^6402 


1 


CAPACITOA-FXD .11# A-iOt lOOMVOC POLTF 


28610 


014^6602 


klM 


0t60-2l99 




CAPAClIU-fXO 30FF «-9( 3006VUC MICA 


28600 


0140-2199 


AiJCA 


0I6»*«390 


3 


CAFACIIOK-FXD .0821# *-iOI 200MV0C POirF 


28880 


OUO-6398 


Aticr 


0160-6390 




CAFACIfOR-FXO *092UF 6-lOt 200WV0C FOiVF 


28680 


0180-8308 


*I3M 


0160-6601 




CAFACIYO9-FX0 «01UF »-10l LOOHVOC F017F 


28610 


014^ 6601 


A1»CV 


0 1 60-6601 




CAFAClTM-fXO •OIUF *-109 lOONVOC 60179 


20680 


0140-6401 


AUCU 


0100*0229 




CAP8CIIUA-F80 33UFA-I08 lOVK TA 


B8288 


1BDOS38X901082 


«tiCl2 


0100-0197 




CAFACIY09-FX0 2«2UF6-10I 20VOC YA 


S62IF 


190022SX9020A2 




0100-1799 




CAFACIY09-FX0 *22066-101 39V0C YA 


96219 


IS 00226X9 03 9 A2 




0160-2199 




CAFACIYOX-FXO 30FF 6-9t 300HV0C MICA 


28610 


0140-2109 


A1AU> 


0121-0632 


1 


CAFACItaa-V TRNR-AIR I.T/lA.IAf 390V 


769T0 


I89-BOB-I2B 


AilCia 


0160-0761 


1 


CAFACITOA-FXO 9FF *-108 900HVOC MICA 


28880 


0180-0783 


A13C17 


0I«M»3 


f 


CAPACITOR-FXO 620PF '-Bk 300WVDC MICA 


28880 


OttO-0383 


AI3C10 


OI80->}« 


> 


CA/Acrroft-Fxo i&uf^-ioiitdvdc ta. 


58268 


lB0DIBeX9030B2 


AI3C1* 


OMO-3M 


I 


CAFACITOM-FXO 348FE-*.lk lOCWUDC FORC 


2840& 


0100- 3048 


A13C21 


0150-0003 


, 


CAFAcrrm-FXD j>iuf ««o-2e» lOOwvDccte 


2888D 


0160-0003 


A13C22 


0100-0107 




CAFAC(TOH-PXO 30VOO TA 


68280 


<B022Mt020A3 


AI3C33 


otetk-siM 


1 


CAfAcrroft-Fxo iiiuF 4.10H tnwvDC cer 


28480 


0160-3138 


A13C24 


0IB0-O1S7 




' CAFACITOR-FXD 2.2UF*-10« iOVOC TA 


58280 


160072SX9030A2 


A13CSB AA 


OICO-0378 




^ CAFACirOR-FXO27PF*-MSaOV0CWICA 


28480 


0160-0181 




0100-7150 




CAFACiron-FXO 33FF 4-6% 300WVOC MICA 


38880 


0160-2160 




0140-0100 




CAFACirOR-FXD30FF 4-SX 30MVOC MICA 


28480' 


0140-0100 


A1X96 


0160-394S 


2 


CAFACITOR-FXD 38FF *- IkSCOlWOC MICA 


28880 


OI60-%86 


A13C27 


01SO-0096 


1 


CAPAOTOR-fXD .OeOP »00-20X 100V7VOC CER 


28480 


(UBDtOIBB 


AI4UA 


0160-2199 




CAFACI7OR-FX0 30AF 4-39 3O06VOC MICA 


28680 


0140r2199 


AlAU) 


0160-3976 


1 


CAAACIYOA-FXO lOFf 4-lt lOOOMVAC FORC 


28680 


0180-3678 


Aiit>I 


0t(O-»77 


1 


CAFACITOR-FXO 970FF 4-19 lOOHVOC FORC 


28660 


0160-3677 




0160-0202 


1 


CAFACITOR-FXO ISFF 4— S| 900VVOC MICA 


72136 


0Mi9ClStU0900«VlCR 


AliLSy 


0160-3930 


1 


CAFACIIOA-FXO lOFF *-18 2SQ0MVDC FORC 


28600 


0140-3930 


AUC3A 


0121-0636 


2 


CAFACJUR-V TRMR-AtR 2.6/26. 9Ff 390V 


76970 


U9-S09-12S 


AlMi 


0l«a-s»8i 


2 


CAPACIIOR-FXO .lUF 4-209 6306VOC NCY 


FR002 


00710640 


AtiCKi 


1902-3237 


3 


0100E-2NR 20V 99 00-7 F0*.6H TC«4.0739 


08713 


S2 10639-286 


AUtA^ 


1901-0033 


2 


OIOOE-6EN FAR 180V 200HA UO-7 


28680 


1601-0033 


AUCki 


19 01-0060 


2* 


OJOOE-SHlfCHlNO 90V 90MA 2N5 00-39 


28680 


1901-0060 


AUcRA 


4901-0033 




OlOOE-CCH FRt 180V 200HA 00-7 


28680 


1901-0033 


AliCA> 


1901-0316 


i 


DID0€-9CH0YY«f 


28680 


1901-0S18 


AliCAb 


1904-0919 




OJODE-SCHOTYK7 


28680 


1901-0918 


Al>l.*i 


<907-3128 


i 


D10DE-2MA 7.32V 99 00-7 F04.66 YC«4.0699 


06713 


S2 10939-163 


A|>CHA 


19G1-0O6O 




0103E-9HITCH1NC 30V 50HA 2NS 00-39 


28680 


1901-0060 


AUCK9 


19CI-0060 




0ID0E-9alTCHlNC 90V 90HA 2N& 00-39 


28680 


1901-0060 


ADUli 


19U-OO60 




OIODE-BHITCHINC BOV BORA 2N3 00-3B 


28680 


1601-0080 


AliCAiA 


1901-0060 




OIDOE-StflYCHlNC 30V SOMA 2MS 00-39 


28880 


^ 1901-0060 


AtiCKli 


1902-3096 


2 


OIJOE-MR A.IBV 28 00-7 FO-.AH 7C— .0188 


08713 


$2 10939-99 


AiiCHib 


1902-3096 




DI30E-2NR 4.7BV 28 00-7 F0..4V 7C— .0188 


08713 


S2 10639-6D 


Aiiua^ 


1901-0060 




ia02C-3MiYCHlNO 30V SOMA 2MS 00-3S 


28680 


1901-0080 


AlJCkIft 


1901-0060 




OJOOE-MIYCHIMO 30V SOMA 2Hl 039 


28680 


1901-0060 


Ai>CRif 


19C1-0067 


2 


OIODE-SVJ7CHINC 20V 7BRA IONS 


28680 


1901-0067 


AtJCkiA 


1901-0O67 




OiOOE-MlICHINC 20V 7SW IONS 


28680 


1901-0067 


AlKni^ 


1901-0O6O 




OlOSE-SVItCIUMB BOV BORA 2NB 0O-3B 


28880 


1901-0080 


AlilA21 


1901-0060 




OIOOC-SMJTCHIHO 30V SOMA 2M9 00-39 


28680 


1901-0080 


A4tCK2A 


1 19 01-^60 




OlOOE-SVlYCHiMO 30V SOMA 2HS 00-39 


28680 


1901-0060 


AllAl 


dA9O-0ea3 




RUtT-REEO 18 lOORA lOOOVOC BVK-COU 


28680 


0890-0663 


AlilU 


>>490-0883 




AUAV-RE60 lA iOOHA lOOOVOC SVOC-COIL 


28680 


0690- 06B3 


AIJM 


049O-OLA1 




RUA7-RE60 lA lOONA lOQOVX SVOC-COU 


286 80 


0690-0*43 


AtiUi 


ttM-0)j71 




YMHSISTOR HPH SI FObJOONi FTb200HH2 


28680 


1896-0071 


AitUA 


188A-OOM 




YRANSISIOR MFH $1 F0«300M6 PY4200MH2 


28680 


1856-0071 


AiiAA 


18t^0l»€> 


6 


YRAVSJStOR 3-FEf 2M6392 N-CHAM D-MOOE 


C6713 


' 2N6392 


AUUA 


1953-0396 




YHANSlStOR 3-FEf 2M6I92 IHCHAN (HHOM 


06719 


2N8392 


AiJW> 


188>038A 




YRANSJSfOR 3-^EY 2166362 6-CHAM O-MOOE 


06711 


, 2M8392 


Aiiwv 


1838-038A 




IRANSISrOR J-FEI 2N4382 H-CNAN O-MOOE 


08113 


2H6392 


A11U7 


1696-0391 


2 


I IRAMSISrOR NAN SI 10-18 FIMBAOMM 


28610 


1896-0391 


AL^gA 


ib:>-ovio 




' YhAVSISYOR FHP si 10-19 FO*360MM 


28680 


1853-0010 


AUUW 


1959-0620 




YkANSJSYQR 3-fET 2M6391 M-CHAM O-MOOE 


08713 


2N8J91 


At>gii 


1996- Oifl 




TRANSISTOR NFM SJ TO-ll F0-360MN 


28680 


1896-0391 


AA SEE NOTE ON SCH 


u 

I 

<81 











See introduction to tbit tection for orderinf information 



6*13 




















Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




IAU*OOiO 




rMNSisfw RNp SI ro-ia rd- 16 bnh 


26460 


lasf-Mio 


Aiitfii 


I6»^007i 




TMNSISTOK HM SI a^SOOW Fr>200IUU 


26410 


1654-0071 




lass- 0*20 




miNSISiaR J-FET 2M*3»I H^NAM [KHOOC 


0*713 


2N4S91 


AliOl) 


iaSS-0202 


1 


fUHSISIM-JFII Mat. M-CHAH O-NOW SI 


17tSA 


i*21 


AlJAi 


0At>*»U» 




aesisrw sioB s« .asii ac rc>-aoo/*wa 


01121 


C65149 


klM 


06U-223S 


6 


USISTOl 22R sa .2M Ft tc--*oo/*aM 


01121 


C62235 


AUAi 






AESISIO* 22K SS .2SH FC IC*-*00/*aW 


ami 


Ct22*S 


AliHA 


QA96-349A 


2 


ftfsiSToa )*ai It .I2SH f u>o*-ioq 


UA3I 


CRF-SS-l, 1-1 


AI^A5 






AESISTOR s*ai It .USN F tC-Oe-lOO 


91437 


CJiF-55-le T-1 


AiJH6 


oTsr-o*6S 




66$|$r06 lOOfl 16 .1256 f TC*0»-100 


24544 


C*-l/l-tO-IWS-F 


atiHl 


orsr-WTo 


1 


6E4IS7QR 2491 IS .I25N F fC*0«-100 


24544 


C*-l/a-T0-2*9S-F 


AUAi 


UOOS-22SS 




MStSIIK 221 St .2SH FC TC«-*00/*tM 


01121 


C62235 


A13H9 


U««3-i03» 




AaSISIO* 1M St .2SU FC tC--*00/*200 


0U2I 


CB1035 


Alikll 


06U-»1«S 




AESiSIOI StOa SI .2SM FC rc>-tM/*»w 


01121 


casus 


AUA12 


21OO-1J0A 


3 


kf Sism-IIWR SOK lot C SIDE-AOJ ir-IM 


32997 


3008P- 1-503 


airaii 


2400-»3i)« 


1 


atsisTOR-iRm 2x tot c siOE-aoj iT-rtN 


32997 


3004P-1-202 


AUAiA 


U696-A447 


1 


USISIO* I.OSK It .12SB F rc«o»>ioo 


2*S4A 


c*-t/a-ro-iosi-F 


Ai>Al» 


06U-t0)S 




RESiSTO* loa SI .2SM FC rC>-*00/*T00 


0II2I 


CBIOSS 


AliHi* 


07S7-O40I 




RESISIOR IM 11 .12SH F IC«0*'1M 


2*s*a 


C*-l/a-70-iai-F 


AliHl7 


00^3122 


1 


RESISiOR *12 It .I2SU F tC-0*-tOO 


03161 


FRESS-l/a-T»-*l20-F 


AlAfti« 


0«»*2OA» 


2 


acsistat 2001 st .2Sn fc ic«-aoo/*9»o 


01121 


C62045 


A41MI9 


oaai*»»ios 


5 


RESISrOt Si St .2SU FC tc— *oo/*soo 


01121 


CI5105 


kiSkil 


0757-0453 


1 


RtSUrOR so. IK It .12SM F TC*0*'tOO 


2*s*a 


C4-i/a-Ta-sot2-F 


AlitUi 


06*o-**aa 


1 


6E5l5tQR 24*7A IS «125H F fC«04-100 


2*s*a 


C*-l/l-T»-2t72-F 


AiitUi 


2I00-530S 


3 


RESISTOR-TRWI SK lOt C SIOE-AOJ It-IRN 


32997 


3004P-1-S02 


AlikZA 


06OS-202S 




AESISIOH 2K St .2SU Ft TC— *00/*2M 


01121 


CB202S 


AkilU9 


0450-1215 


3 


RESISrOR»«K 6» H/O MATCHED SET R2SJ8, 431 


26460 


oaaa-tcis 


AliK^A 


06«>-2025 




RESISrOB 2K St .2Se FC rC«-*00/*700 


01121 


C62025 


Aiiiur 


04 53-4015 




RESISTOR too SI .2SK FC IC*-*OOT*SOO 


01121 


CtlOlS 


AIM4 


068S-261S 


1 


RESUrCR 240 5S *25H FC fC*-400/»400 


01121 


CS2*1S 


AktiU* 


04 03-22A5 




RESISTOR 22R 5S «25H FC fC*-400/»600 


01121 


CB22SS 


AiiK3l 


0o«5-lil35 




Risisrn lOR 5S .256 FC 7C«-400/»700 


01121 


C61035 


AlAAA^ 


0463-5145 




RESISrCB SIOR St .2SM FC tC— BOD/*M« 


01121 


C65145 


AiJHi} 


0 7 57-0442 




RESISIO iOR It .12SR F rc*0*-100 


24544 


C4-1/6-T0-I002-F 


AIM34 


0*B}-U)S 




RESISTOR UK St .25W FC TC«-400/*600 


01121 


CB12SS 




06n-302S 




RESISIOR 3K 56 .ISU FC TC--400/4700 


01121 


tajius 


AlJK^o 


21CO-3304 




RESISTA-XU6 SOK lOS C SIOE-ADJ 17-764 


32997 


3006P-1-503 


AljKi/ 


04 63-4715 




RESISTW *70 St .2SU FC TC— *0a/*600 


01121 


C64715 


AAik30 


3498-621 5 




RESISTOR AtTK .5« (P/0 MATCHED SET R2S.3S,43I 


26460 


0696-6215 


AliJC>9 


0499-4202 




RESISIOR 6.67K it «l25lT F TC*0»-100 


24544 


e*-i/B-To-aa7i-F 




0498-4202 




RESUra 6.67R IS .125V F TC«0^i00 


24544 


c*-i/a-io-ae7i-F 


AiikA< 


04W-4202 




RcSISIO a.aTK It .12SM F IC-0«-100 


24544 


C4-L/i-T0-66n-F 


AiiK%) 


04 96-6215 




RESISIOR 2M ,S% IF/0 MATCHED SET R25J8.43) 


2 B*aO 


0496-6215 


AliAAA 


04 96-6216 


4 


RESISIOR 202K SR IF/0 HATCHED SET R44, R4SI 


26460 


0496-6216 


AiiH^i 


0498-6214 




RESISIOR 2H .SR |F/0 MATCHED SET R44, R4S) 


26460 


0696-6214 


AliHk\* 


2 1 00-3311 


2 


RESISIOR-IRNR SOO tOt C SOE-AOJ iT-TRN 


32997 


3004P-1-501 


AiiiJl 


1824-0099 


3 


1C LN 201A OF AMR 


27014 


LM201AM 


Ai»\a 


tajb-ousa 




IC IM 201A OP AMP 


2701* 


IM201AH 


*i>U> 


leio-gfSa 


1 


U. FIW LINE CHIP 


26460 


1610-0250 


Al)4>4 


1628-0059 




IC IM 201A OP AMP 


27014 


LM201AH 


Alili) 


1628-0109 




SC HA 2625 OP AMP 


26460 


1624-0109 


Ai»U» 


1620-0471 




iC-JICITAE SNT*0*N TU HEX 1 


01295 


SM7406M 




16U0-0SIS 


1 


STAHPIN61 6A3 «020** THK 


lAsas 


080 




4040-0746 


2 


EXIRACrOk-FC BO etK FULTC .0*2-a0-IMtNS 


26460 


4040-0746 


AiA 


03455-44514 


1 


F.C. ASSEHBCT. AO CONVERTER 


26460 


0USS-6AS1* 


Al4vi 


ai>>-o>M* 


3 


CAPACItUR-FXD .lOF «IO-20t 1006F0C C6R 


26460 


0190-0064 


Ai4W 


0140-4396 




CAPACtTQR-FKO .6620F 4-136 203HV0C POiVP 


26460 


oi&o-*39a 


A44bi 


0140-0149 


1 


CAPACITQR-FKO 470PF 4-5S 360MV0C MICA 


72134 


CRISF*71JOSOOHVKA 


A44C4 


015^0064 




CAF4CITOR-FXO .lUF *tO-20t lOOVVK CER 


26460 


0150-0064 


A4 4C> 


0150-0064 




C4FACITOR-F40 .lUF *t»-20t lOOkVOC CER 


2t*IO 


oiso-oaa* 


Ai4kk 


014^2204 




CAFACITOR-FXD lOOFF «-St S70BV0C RICA 


2t*t0 


0160-2204 


AiileAl 


iyo2-3<ai 




0I306-6MR 26V 56 00-7 P0«*4H rC«4.073t 


0*71S 


SI im}«-2A» 


M4I.1U 


1901-0376 




OIOJE-QENFRF 3SV SOMADOX 


26460 


laoi-OSTB 


A|4CKi 


190I-U040 




DIU0C-SVlfCHjM6 30V 50NA 2NS 00-35 


26460 


uai-oo*« 


AI4vAA 


i9ci-uar* 




DtOuE-ttH PAP 35V 50HA 3(KT 


26460 


l«01-077a 


Ak'sCK? 


isoi-oira 




DI306-8CM PRP 35V SOMA 0CH7 


21460 


1901-0376 


at«Ua 


19 01-0376 




OIOOE-GENFRF XV SOMA OO-X 


2l»tD 


l«Ot-C37t 


AlAVKr 


i»oj-3csr 




OJOOt-lNR 20V 5t 0(H7 P0«.4V TC«4«073t 


0*7IS 


S2 10939-269 


AiALkO 


19C1-0U40 




SOSE-SHIICHIMS SOV SOMA 4NS DO-SS 


26460 


1901-0040 


AUCK4 


1901-0040 




OIOOE-SMITCHINO SOV SOW 2NS D0-3S 


26460 


1901-0040 


A|4tAiiJ 


19 01-0043 




OlOOB-SHiTCHIHC 30V SOMA 2NS 00-35 


2a»ao 


1901-0040 


AA SERIAL NU 


HERS AN 


> ABOVE. R 


lOTE |A6t ON SCHEMATIC B. 







See introduction to this lection for orderint information 



6-14 
















Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


aiacau 


1401-0311 




OJ 00 E- SC HOT Tier 


21480 


laoi-osia 


at*cat< 


1401-0040 




0I00C-5H1TCHIH4 30¥ 30<U 2MS 0<H33 


24440 


1901-0640 


4i«ai 


1133-0020 




UANSiSTOt pm $1 A0»300HII 7T-130AH4 


24440 


lasvooEO 


41442 


less-wsa 


1 


raaNSiSTOi MR SI ro-ts aCMSaonH 


24440 


lass-oosA 


41402 


14 33-0420 




raaNsiSTOT j>set ENaiti h-chan d-mm 


04711 


ENASai 


at4M 


1433-0033 


i 


lAtNSISTSa ArfEt N-CHAN D-NOOE JO-1Z SI 


Eaaao 


ItSS-OOSS 


atass 




1 


laANSISTOR-JKI DUAL N-CHAN D-NOOC TO-7. 


24440 


lass- 024. 


4I4M4 


1133-0020 




raAHSISTW aw si aCNSOOW Er>ltOHH/ 


24440 


ItSE-OOEO 


aiaai 


04B>-I03e 


1 


RESISTOI tOK SB ,2SN fC TC— AM/*r0O 


01S07 


CB1036 


41442 


04 43-2023 




KSISTOR EB SB .ESB RC tC— ABO/rTOO 


OIIEt 


CIEOES 


41442 


06 94-3133 




RESISTOR a.aaK ib .iesh r tc>o*-im 


EAsaa 


CV-l/a-TO-AAAl-F 


41444 


OBII-ESTT 


2 


i€SIST04 104 *|t •I23M PW TC«06-2 


laiao 


1274-1/14-A-1002-I 


41444 


orST-oasa 


1 


tESlSTQA 4.32K It .USH P fC*0«-tOO 


24346 


CVl/6- T0-4321-F 


41444 


0737-0240 




USISTOt U 18 •123H F TC*46-100 


24346 


CA-l/a-TO-l001*F 


ai*a} 


D6 SB- SEES 


t 


tisisroi 6d49K 18 .123M F tC»06-100 


24366 


C4-1/6- T0-6491-F 


41444 


oTsr-oaao 


1 


AESISIGPl 7.31 18 .1234 F rC*06-lM 


24366 


C4-U6-7^7301-F 


41449 


0737-0442 


1 


4631 STA 754 11 .USH F IC«0»-100 


24346 


CA-1/6-TO-7302-F 


414412 


0737-0430 


1 


RESISTOR E.EIR IB .USB f TC'IX-IOO 


24346 


C4-1/6- T0-2211-F 


414411 


sasa-ssu 


1 


RESiSIOR aas tB .lESU F TC«0*-100 


24341 


CA-ua-ro-AASR-F 


Altaic 


04 43-3023 




RESisroR SR SB .ESN Fc ic— a«o/*roo 


eiiEi 


casoES 


41441 1« 


oaas-22as 


1 


4fSISr04 22N 5t *23« FC TC«-900/«1200 


01121 


CBEEAS 


414414 


BTsr-oaaE 




RESIStOt IOC IB .USH F TC*0»-IOa 


24546 


C4-1/8-TO-1Q02-F 


41441a 


a«ii-soiT 


1 


REStsrOR is.aa iB .tESi pn TC-o*-s 


14140 


issfr-i/a-c-t«aE-F 


414414 


0737-0441 


1 


Aisuroi 4.23R 18 r123W F TC«06-L00 


2434< 


C4.I/0.TO-623I-F 


41441 r 


orsT-o*as 




41S1STQR 1004 14 .1234 F rC«Q»-100 


24343 


C4-L/6-TO-1003-F 


aiMis ae 


or ST' 027} 




cesisiai 3DIK IB .lESa F rc*o«-too 


03S7 


CA-l/a-TO-3011 -F 


aiSHi* ae 


(Mm^44An 


1 


44SSSr04 049 18 «U3H F TC«0*-100 


03202 


CA-lFa-tO-*4»R-F 


aitMcj aB 


oeBS-arre 




RESISTOR 0.A0K1B .ISSN F tC-0*-100 


03»2 


CA-I/I-TO-040T -F 


414421 


osu-urr 




4ESISTCR 104 «|8 rIISH FOri TC«0»-2 


14143 


1274-1/10-4*1002-6 


414422 


0694-3133 




4E$|$T01 4.644 18 .1236 F TC«0«-100 


24544 


C4-1/6-T0-4641-F 


414424 


0643-4213 


1 


4831 SrU4 420 3C .23H FC TC«-400/»600 


OUEI 


C66213 


at«u* ag 


Da«3-<o% 




RESISIOR tOK SB .ESe FC TC— A00/«700 


01607 


C61Q36 


attiua AB 


0643- 1038 




RESISTOR TOK SB .250 FC tC*-a00/«7O0 


01007 


C01036 


414424 


0 6 94-3260 


2 


4EStSTtt 4644 18 .USV F TC*0*-100 


9163? 


CnF-3»-l* T-i 


41442/ 


0694-4649 


Z 


4tSl$T04 1.2M .IS .23H F TC«06-23 


1970L 


nF32C-l 


41442S 


0643-2733 




RESISTOR ETR SB .ESB FC TC— aO0/*«0O 


OUEI 


C6273S 


414429 


0643-3923 


1 


RESISIOR S.SR SB .ESN FC TC— aOO/*TOO 


01121 


C63925 


41442U 


0694-4649 




RESISTOR l.2an .IB .2SH F TC-0<-2S 


I9T0I 


■FSEC-i 


414431 


0694-3260 




RESisrcR aaaR ib .usm f rc-D*-ioa 


91637 


CM-5S-1. r-l 


Al-skii 


0694-3499 


3 


4E$|$1<K 40.24 18 .123H F TC«06-100 


24346 


C4-1/6-TO-4022-F 


414«ii 


0494-3499 




4631 3T04 40.24 18 .123H F TC«0«-100 


24346 


CA-l/8-tO-AOEE-F 


414434 


0643-1023 


1 


RESISTOR IK SB .ESN FC TC— a00/*600 


01121 


CBIOES 


414«3> 


U696-3499 




463I3T04 40.24 18 .123h F rc*0«-100 


24346 


CA-I/I-TO-AOEE-F 


414436 


0643-2433 


1 


RtSiSrOR EAR SB .ESK FC TC>-400/*a00 


OUEI 


C62433 


414437 


oaBS-lusS 




4C3I3104 lOK 58 .23H FC TC«-400/»700 


01121 


C61033 


4l4Ai4 


VaS>-i9aS 


1 


RESISTOR MOR SB .ESR FC TC— B00/*900 


OUEI 


C63043 


414«U4 


0643-3023 




RESISTOR 3K SB .ESN FC TC— 400/»TOO 


01121 


CS90ES 


414K49 


0797-0442 




463I3T04 104 18 .1234 F TC«0»-100 


EASAA 


CA-l/l-tO-IOOE-F 


414441 


0737-0442 




■Esisrni lox IS .tESa f ic*o*-too 


24344 


C4-1/6-T0-1002-F 


414442 


0643-4733 


1 


RESISTOR ATR SB .ESH FC TC— AOO/raoO 


01121 


C64733 


414K43 


0643- 2UJ3 




4631 ST04 204 38 .236 FC TC*-400/«400 


0U21 


C.EOSS 


414x44 A A 


0643-3046 


3 


4ESISTQ4 2M 38 .236 FC TC*-900/»1 100 


01607 


C62086 


414X43 


Aaas>ioas 




46313MB lOM 38 .23H FC TC*-90O/«ll00 


OUEI 


Cei069 


414446 


0643-1063 




46313104 ion 38 .236 FC TC*-900/4ll00 


01121 


CBIOAS 


414447 


06 94-4478 


i 


46313704 9.764 18 .1236 F tC*04-100 


OJIM 


FNES5-tra-T0-»TAl-F 


A14A44 


o7»r-oso7 


1 


RESISTOt I«K IB .lESU F TC«0*-100 


03292 


CA-ira-TO-1823-F 


414U1 


tsoa-ooro 


2 


OlOOE-ARRAT 


Esaao 


1906-0070 


aisu< 


19C6-0070 




0I006-A44AT 


Eaaao 


laOA-OOTO 


414133 


t«2a>047l 


z 


IC ORAMF LOW-DRIFT TO<M 


OEIBO 


0P-07O 


414134 


14 26-0309 




U 60 318J OF 6HF 


EASSS 


A0316J 


A14U3 


te<o-0Ear 


1 


IC* PHPLn 0P£4AllUNAk 


13616 


741C8009 


414W6 


1426-0134 


t 


1C cn 339 COnFAAATOi 


ETOIA 


CH339N 




3U40-6643 


z 


EMf46CT04* F.C« 40440 


21460 


5040-6643 




3000-9043 


z 


FliMF.C. 4064D CXT44CTU4 


26460 


3000-9063 


aa stt s 


OTE ON SCHEMATIC 4. 










AB SERIAL NUMBERS 1«23A062a> AND ABOVE. SEE NOTE ON SCHEMATIC B 







FIS 



Sec Introduction to thii section for orderinc information 














Table 6-1. Replaceable Partt(Cofird) 



Reference 

Designation 


HP Part Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


AIS 


034E6-88E1E 


H 


AC ASSEMBLY. AC RMS 


28480 


03456 88515 


A1EC1 


OIEO-0171 




CARACITOR-FXO 1UF *90-20% fiOWVOC CER 


28480 


0150-0121 


A1SC2 


0170-0088 




CAAACITOR -EXO .027 UF 200V 


28480 


0170-0066 


A16C3 


0170-43038 


1 


CAFACITOR -FXO 32 UF 20OV 


28480 


0170-0038 


AI6C4 


0180- 30M 


1 


CAAACITOR-FXO 1UF • 10« 100WVDC CER 


78480 


0180-3094 


AlSCi 


0180 3134 




CAFACITOR-FXD 01U1 •-10» 1D0WVK CER 


28480 


0160 3134 


AIKS 


0180 303S 


1 


CAFACITOR-FXO 7S0FF • 5S 30WVOC MICA 


28480 


0160 2038 


A1SC7 


0180 330< 




CAPACiTOR-fXO 100RF *-6% 300WVOC MICA 


28460 


0160 2204 


A16C8 


0160-0163 




CAPACITOR 'fXD 033 UP 200V 


26480 


0160-0163 


AIKS 


0160 3666 


1 


CAPACITOR-PXO UP *- 10% SOMTVOC MET 


28480 


0160 3686 


AIKII 


0180-7284 




CAPACITOR-FXO 20PF •-$« 900WVOC CER 


28480 


0180-2264 


A1KI2 


0140-0198 




CAPACITOR-FXO 200PF «-5» 300WVOC MICA 


72138 


DMtSF201J0300WV1CR 


AIK'3 


0180 2257 




CAPACITOR-PXD 10PF *-6% 600WVDC CER 


28460 


0160-2267 


A1SC1AC1S 


0180-0391 




CAPACITOR-PXO 1UF • 10% 36VOC TA 


69209 


1600I06X903BA2 


AtKIS 


0160-3367 




CAPACITOR-FXO 10PF •-5« 50OWVOC CER 


28480 


0190 2267 


ATKJ7-19.CI1 


0150-0121 




CAPACITOR-FXO lUF >80-20% SOlWDC CER 


28480 


0150-0121 


AIK22' 






PADDING LIST 








0160-3767 




CAPACITOR-PXO 10PP ••6% 6O0WVOC 


28400 


0180 2757 




0160 3368 




CAPACITOR-PXO 12PP «--6% 500WVOC 


28460 


0180-2268 




0160 3361 




CAPACITOR-FXO 16PF «-6% 600WVDC 


28460 


0180 2261 


A16C23.C74 


0160-0131 




CAPACITOR-FXO fUF *80-20% SOWVOC CER 


28480 


0150 0121 


AISC2S 


0160-3648 




CAPACITOR FXO 346PP *-t% 600WVQC PORC 


28460 


0160-3640 


AISC2S 


0150-0121 




CAPACITOR-FXO lUF >60-20% 50WV0C CER 


28490 


0160-0121 


AI6C2T 


0160 3646 




CAPACITOR-FXO 38PF *-t% 600WVOC PORC 


26480 


0160-3945 


A1K2S 


0150 0121 




CAPACITOR-FXO lUF >80-20% 50WV0C CER 


28480 


0150-0121 


AISC29.C30 


0180-4480 


2 


CAPACITOR. FXO lOPF IDOV 


28480 


0160-4490 


A1SC31 


0t60-3946 


t 


CAPACITOR-FXO 970PF >-I% 50WFVOC PORC 


28490 


0160 3949 


A1SC32 


0160-3300 




CAPACITOR-FXO 43PF > 5% 300WV0C 


28490 


0160-2200 


AISC33 AS 


0160-3988 




CAPACITOR-FXO 22UF >-10% 400VOC 


28480 


DIED 3988 


A1«C34 


0121-0436 




CAPACITOR-V TRMR-AIR 2.4/24 5PF 3S0V 


74970 


I8S-509 125 


A1SC3S 


0140 0193 


1 


CAPACITOR-FXO 82PF >-S% 300WVDC MICA 


72138 


DM15ES20J0300WVtCR 


AIK3S 38 Aa 


0160- 306S 


3 


CAPACITOR- FXO .01 UP *80-20% lOOVOC CER 


26460 


0160 2055 


AIK40 AJ 


01U 0128 


1 


CAP AC ITOR-P X 0 F * - 20% SOOVOC CE R 


28490 


0160-0128 


AIKRI.J.a 


1901 0040 




DIOOE-SWITCHING 30V SOMA 2N$ 00-35 


28490 


1901-0040 


At&CRA.S 


1901-0518 




DIQ09- SCHOTT KV 


28490 


1901-0919 


AtSCR6 


1901-0040 


1 


DIODE -SWITCHING 30V SOMA 2NS 00-36 


28490 


1901 0D4O 


At6CR7 


1901 0586 


2 


DIODE. G£N PRP 30V 25MA TO-72 


28490 


1901’0S66 


AiaCRB.CRd 


1903-3073 




DIODE -2NR 4 32V 6% 00-7 PO-4W TO* ^ 035% 


04713 


S2 10936-77 


At5CRI1-cni3 


1901 -0040 




DIODE-SWITCHING 30V SOMA 7NS 00-35 


28490 


1901-0040 


AISKt, K3 AA 


0490-0683 




RELAY-REED lA lOCMA 1000VDC 6VOC-COIL 


28490 


0490-0683 


A^SK2. K4 


0490-0663 




RELAY -flCEOIA tOOMA tCOOVDC 5 VDC-COIL 


28490 


0490-0883 


AI501 


1854-0071 




TRANSISTOR NPN Si FD»300MW FT*20CMHZ 


28480 


18S4 0071 


A1SQ2'04 


1895-0420 




TRANSISTOR J-FET 2N4381 N-CHAN D-MOOE 


04713 


2N4391 


AI&QS 


idss^ooe? 


1 


TRANSISTOR J-FETN-CHAN D-MOOE Si 


28480 


1955-0062 


A1S06 


1664-0071 




TRANSISTOR NPN 01 PO'30OMW FT>200MH< 


28480 


16$4- 0071 


A1B07 


1653-0030 




TRANSISTOR PNP $1 P0«300MW FT*160MIU 


29480 


1853 0020 


AIS08 


1855-0420 




TRANSISTOR J FET 2N4391 N-CHAN 0- MODE 


04713 


2N4381 


A1&09. 01 1 


1884-0753 


2 


TRANSlSTOfl. ADS 16 


28460 


1854-0753 


AI5QI? 


1663-0030 




TRANSISTOR PNP SI PD.300MW FT-I50MHZ 


28460 


1653 0020 


A160I3 


1664-0071 




TRANSISTOR NPN Si PD*300MW PT-200MK2 


28460 


1854 0071 


AIEQU 


1853-0069 


1 


TRANSISTOR PNP 2N4617 SI PO-200MW 


07263 


2N4917 


A1SQ15 


1^-0315 


1 


TRANSISTOR NPN SI PD«350UW FT>300MH2 


04713 


SPS3611 


A16Q16 


1864-8071 




TRANSISTOR NPN Si PD 300UW FT-200MH2 


28480 


1654 0071 


A1SQ17 


iK3-0Q20 




TRANSISTOR PNP SI PD-300MW FT*ISOMH2 


284B0 


1653 0020 


A1M18 


1865-0061 


1 


TRANSISTOR J-FET 2N5246 N-.CHAN D MODE SI 


0129S 


2N5245 


A1SQ16.020 


1885-0420 




TRANSISTOR J-FET 2N4301 N-CHAN D-MOOE 


04713 


2N4361 


Aisni 


0683 1035 




RESISTOR 10K 5% .2SW FC TC> 400.‘-700 


01121 


C61035 


A16R2 


0663 3236 




RESISTOR 22K 5% .2SW FC TC--4OO/.B0O 


01121 


C8223S 


AI6R3 


0683 6146 




RESISTOR 510K S% .2SW FC TC>-a00.’>800 


01121 


CB6145 


A1SRA 


0683 •2236 




RESISTOR 22K 5% 25W FC TC--400.>9IX) 


01121 


C87235 


AISRS 


0883 5145 




RESISTOR SlOK 6% 25W PC TC« 600 '*900 


01121 


C9614S 


AI5H8- 






PADDING LIST 








0686-4470 




RESISTOR 668K 1% 12SW P 


24549 


C4 I/S To-«eei F 




0767-0444 




RESISTOR 12 IK 1% 125W F 


24549 


C4-l/S-T0'1212-F 




0888 4308 




RESISTOR 188K 1% 12SW f 


24548 


C4 1/9-10-1692 P 


A1SR7 


0757 OU9 


1 


RESISTOR 20K l%.125WF TC>D>-1IM 


03292 


w4-t78-TO-849H-F 


A1SR8 


0888-8892 


1 


RESISTOR I80K 1% I2SW F TC*0> -75 


07718 


CEA -993-N330 


A1SR9 


0668 3262 


1 


RESISTOR 40 21% 125WF TC>Oi- 100 


24548 


C4 -1/8-TO 4022-F 


AISRIt 


0898 3158 


1 


RESISTOR 26 IK 1% 12SW F TC^ 100 


24548 


C4-1>8 TO 2612 f 


A1$R1? 


0663-2466 


1 


RESISTOR 24M $% 25W FC TC- 800/>1l00 


01121 


CB2455 


A1SR13 


0686-3466 


1 


RESISTOR 267K 1% .129W P TC*<K 100 


24649 


C4-I/S TO 2873 F 


A15R14 


0693 1036 




RESISTOR 10K 5% 25W FC TC >-400.-700 


01121 


CB103S 


AIBRI6 


0883-2238 




RESISTOR 22K 5% 25W FC TC- .400/-600 


01121 


CB2236 


AI6R10 


2100-3161 




RESISTOR TRHR 20K 10% C SIDE-AOJ 17-TRN 


32967 


3008P-I 203 


A1BR17 Ac 


2100 3058 




RESISTOR -TRMR 5K 10% C SIDE AOJ 17-TRN 


03744 


3006P 1 502 


A15R18 At, AN 


0888 8350 




RESISTOR 732K1% I25W F TC*0> - 100 


03282 


MCK 1/8 10 1323 F 


A1BR10 


0767-0417 




RESISTOR 582 1% 125W F TCH3> 100 


24549 


C4 1/8 TO S82R F 


A19R21* 






PADOIAG LIST 








0683 1645 




RESISTOR 180K 5% 2SW FC 


01121 


CBI848 




0683 2245 




RESISTOR 220K 5% 25W FC 


01121 


CB2245 




0683 2446 




RESISTOR 240K S% 25W FC 


01171 


C 62445 




0663-3046 




RESISTOR 300K B% 25W FC 


01121 


C83045 




0693-3646 




RESISTOR 360K 5% 2SW FC 


01121 


C83645 




0693-6146 




RESISTOR 5I0K 5% 2SW FC 


01121 


C65145 




0883 7545 




RESISTOR 7SOK 6% 2&W PC 


01121 


CB7545 




0883 1555 




RESISTOR 1 6M 5% 2SW FC 


01121 


C81555 


A1SR22 


0767-0401 


1 


RESISTOR 100 1% 12SW F TC*D«-10D 


24548 


C4.1/9-T0 lOOn.p 


AA SEE NOTE ON KHtMATIC 3 










AC SEE NOTEONKHEIAATICS 










Aj SEENOTEONKME>iUTIC3. 










AL.AN SEENOTEONKHFMATIC3 











AP SEE NOTE 0NSCHCMATIC3. 



6 It 










Table 6-3. Reploceoble Parts(Cent'd) 



Reference 

Designation 


1 

HP Part Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


A1SA23 


0BS3-IWS 




R ISIS TOR 100KS« 3$W PC TC- 400/ *800 


01807 


C8I(M5 


Al$fl34 AQ 


0693' 7336 




RESISTOR 22K m 26W EC TC* «00/<800 


01121 


C02336 




0M>7Oe3 


3 


RESISTOR 100K l» T7SW f TC^-2S 


03392 


NE55 


A16A36 


06M-4439 




RESISTOR 1 6TK l« I25W F TC^ >00 


34546 


C4- 1/8- TO- 1871- F 


AfSR?7 


0696 - 3379 




RESISTOR 4 99K 1% .126W E TC*0< 100 


24546 


C4-1/B- TO 4991 0 




2100-3161 




RESISTOR TRUR 20K I0« C SIDE - AOJ IT TRN 


32997 


3006P 1 303 


AI&A31 AL. an 


0696 6350 




RESISTOR 732K in IHW F tC'O'-lOO 


03292 


MC5C-I/8-TO-7323-F 


AI&A32 


0666 0064 




RESISTOR 2 I6K l« 126W E T&HX-lOO 


24546 


C4 •1/8>T0-215I F 


AISR33 


one 34*2 




RFSlSTOR 3 67K \% 13SW F TCHh-tOO 


24546 


C4-1/8-TD -3871 F 


AISR3« 


07B7-04I7 




RESISTOR 562 1% I35W P TC«O« t00 


34546 


C4-1/8 TO 5B2R F 


AISR3S 


0757 •ozeo 




RESISTOR 1R 1% .135W F TC><K 100 


24546 


C4-1/8-TD 1001 F 


AI^A36 


06«e 44«0 


1 


RESISTOR 849 1% .'35W E TC-O*-t0O 


03292 


C4.ly8-T0 649R F 


A(SA37 


0663-5109 




RESISTOR 51 5% 25MI FC TC* FOO'^SOO 


01T31 


C8S105 


AISR38.R3a 


osaa sioe 




RESISTOR 51 5% 26W FC TC*-400/*500 


01)21 


C85105 


AI&R41 


0/67 04>3 


* 


RESISTOR 392 t« I26W E TCM)*-100 


24546 


C4 1/8 TO 392R- F 


A1fift42 


0609 4479 




RESISTOR 1 67K 1% I2SW E TC-0<-t00 


34546 


C4 1/8- TO 1871 F 


A1SM3 


0698-4478 


1 


RESISTOR I0.7K 1% I26W F TC*O*-l00 


34546 


C4 1/8'TO 1072-D 


A16H44 


0683-5106 




RESISTOR 51 5« 2SW FC TC* 400/*5aO 


01131 


C95105 


A16H46 


0688-44Z9 




RESISTOR 1J7K 1% I25W P TC<4>« 100 


74549 


C4 1/8-TD-1671-F 


AISH46 


06M 4447 


1 


RESISTOR 380 1% 125W P TC-0*> 100 


34546 


C4 I'S T0-360R F 


AI6R47 


0757 0433 




RESISTOR 3.33K 1% .129W P TC«O*-100 


74545 


C4-1/8>T0 3321- F 


AISR48 


0757 0438 




RESISTOR 5 11K \% .125W F TC«O*-100 


74646 


C4> 1/%-T0'5111* F 


AISR49 


0696 3379 




RESISTOR 4 99IC 1% 12Mr F TC«0* 100 


74545 


C4-l'8-T0-499t-F 


A16R91 Ac 


2100-3096 


1 


RESISTOR TRMR 200 I0« C SIDE 


03744 


3006P 1 201 


A1SRU Ac 


0698- 6630 


1 


RESISTOR 20K 1« I25W F rC‘0— 25 


03293 


NE55 


AI5RS3 Ac 


0598 6360 




RESISTOR 10K IS I25W F TC-0— 25 


03292 


NESS 


A1SRS4 


0606-3431 


1 


RESISTOR 23.7 IS I75W F TCHh-IW 


0386B 


PMES5 l/B TO 23R7 F 


A)SR» 


0696 - 6370 




RESISTOR SK IS I25W F TCHH 26 


03888 


PME55 T9 5001 8 


At&RSe 


Z100-316I 




RESlSTOR-rRMR 30K 10% C SiDE-ADJ 17 TRN 


33997 


3006P-1 303 


A1SRS7.RM 


0663 1605 




RESISTOR 15 S% 2SW FC TC--40a *500 


01131 


C6150S 


AISBBD E . 


0683-1045 


3 


RESISIOR 100K 6S 25W FC TC 


01607 


CB1045 


AI5R61 


0683 1035 




RESISTOR 10K » .35W PC TC» ' ^Oa ^TOO 


01121 


CB1035 


A16R62 


0757 0417 




RESISTOR 562 136W F TC^-100 


24546 


C4-t/8-T0 S67R P 


A15R63 


0/57 0487 




RESISTOR 825K 1% 13SW f TC^-100 


24546 


NA4 


A1SHS4 


0698-6320 




RESISTOR 5K IS I25W F TC*<H-2S 


03886 


PME55' 1i8-T8 *6001 -8 


AISR60 


3100-3161 




RESISTOR-TRUR 20K 10SCSI0E-AOJ I7-TRN 


32997 


3008P-1-203 


Al5H6d AQ 


0663-1 63S 




RESISTOR I6K SS .25* FC TC*-400T-800 


01607 


CB1635 


A1SRS7 AO 


0693-1335 


t 


RESISTOR I3KSS .25* FC TC'-400i*eOO 


01607 


CB1335 


Aisnes 


0663- 1039 




RESISTOR 10K 5% 35W FC TC*-400^*700 


01131 


CB1035 


AI5R69 


0663-1039 




RESISTOR 10K 8% 35W FC TC«>400'«700 


01121 


CBtan 


AI6R7t 


0757- 


1 


RESISTOR 332 






A1SR72 ^8 


ZIQ0-31Z2 


2 


RESISTOR-TAMR 100 10% C TOP 


03744 


3006P 1-101 


A15R73 


3100-3066 




R6SISTOR-TRMR 5K 10% C $l06>AOJ 17-TRN 


01885 


43P503 


A1&R74 


2100-3306 




REStSTOR-TRMR 50A 10% C &OE-ADJ 17-TRN 


32997 


3005P- 1 -503 


A1SR76 As 


210O-3T94 


1 


RESISTOR-TRMR IK 10% 6 SlOE-AOJ 17-tRK 


03744 


3006P 1 102 


AfSR7fi 


0696 878Z 




RESISTOR 720K .SS <R/OMATCHED SET R78.BB.91I 


76460 


0886 07B3 


AISR77 


0757 0467 


5 


RESISTOR 635K 1% .135W F TC-0*- 100 


24546 


KA4 


AISR7B AC 


0757-0380 




RFSiTOR IK 1% 12SW F TC-0* -100 


03292 


C4- 1/8- TO- 1001 -F 


A1SR79 


0683 1508 




RESISTOR 15 5% .2SW Fc TC--400i*500 


01121 


C6I505 


AtSftBI AU 


0696 IMM 


3 


RESISTOR 5.49K 1% .1W F TC-0^-10 


26460 


one 8964 


AI5R63 AM 


0666 B863 


1 


RESISTOR 169K 1% IW F TC<«-I0 


38480 


0698 6963 


A15RU AM 


0698 S965 


5 


RESISTOR I.97K 1% .1W F TCH>«-10 


29460 


0608-8965 


AISRB4 


0757 0433 




RESISTOR 332K IS .125* F TC*0* 100 


34546 


C4-1/8 TO 3321 F 


AI&RB6 AM 


0698-8966 




RESISTOR 634 IS .1* F TC*0*-I0 


38480 


0608-8966 


AI6R8$ 


0698-B782 




RESISTOR I96M 6S IFiQ MATCHEDSEI R78J6.9II 


29490 


0608-870^ 


AI&ASe 


0683 1605 


4 


RESISTOR 15 5% 25W FC TC* 40(^*500 


01121 


CB1505 


Aisnn* aa 






FADOINC LIST 








0696 4306 




RESISTOR 16 9KIS ITS* F TC*0* - 100 


03393 


C4 - 1. *8-10-1 692 -f 




0696-3)36 




RESISTOR 17 IK 1% I38W F TC«0* - 100 


03293 


C4 1/8 TO- 1782 F 




07S7 0448 




RESISTOR I82K1S 125* F TC- 0* -100 


03293 


C4 V8-TQ-1883 F 




0698 4483 




RESISTOR 1I*7K 1% 135W F TC*O*-l00 


03292 


C4-1/8-TO 1873 F 




0699-4484 




RESISTOR 19 1K IS 175* F TC*0* 100 


03292 


C4-1/8-TO 1913 P 




0757-0449 




RESISTOR 20K IS 175* FTC*0* 100 


03292 


C4 t«8-TO-2003 F 


AISR9I 


0698 0783 


3 


RESISTOR SET. WATCHED 2M 6% IP-*Q MATCHfiOSfT 


29480 


0608 -8787 








R76, R80. R911 






A16R92 


0698 9316 




RESISTOR 2M SSIF/OMATCHEOSETR93.R93I 


29480 


0808 8316 


AISR93 


069S-B2I6 




RESISTOR 30. 2K .5% IP'O MATCHED SET R92. R93I 


38480 


0888 8219 


AISR»< 


ZIOO-33II 




RESISTOR -TRMR 600 10% C SIDE AOJ 17-TRK 


33997 


3006P-1-601 300-F 


A19RM 


0757 3567 


1 


RESISTOR 909 IS 12SW F TC*0«-100 


26480 


0757-3S67 


AIER96 AA 


0898 5540 


1 


RESISTOR 1 1U 6S 25* FC TO 


0)607 


CB115S 


AISR97 Aa 


0883 1046 




RESISTOR 100K6% 25WFCTC 


01607 


CB1045 


AI9Ut 


I8Z5-0340 


1 


IC.OPAMPL LF356 


38480 


■ 928-0340 


A19U2 


1820 0476 


1 


ICIM306OFAUF 


27014 


I M306H 


AIBU3, UA AH 


1626-0616 


3 


1C 357 0PAMFT0-99 


78480 


1626 0510 


A1SUB 


1830 0471 




1C DIGITAL SN7408N TTL HEX1 


01295 


SN7408N 


A16U6 


1929-0357 


1 


ICLF367HOP AMP 


37014 


LF3S7H 




4040 0749 


2 


EXTHACTOR-PC 50 6LK POL VC .062-BD THKNS 


28480 


4040-0748 




1305-0060 


1 


HEATSINK SEMICONDUCTOR 


28460 


1205 0090 




1205-0002 


1 


HEATSINK TO-&^TO-39-PKG 


28480 


1206-0002 


AZO A 


1M77-0950I 


1 


ASSEM61V REFERENCE 






AA SEENOTEONSCNEUATIC3. 




NOT FIELD REPAIRABLE ORDER 






A0 S(( NOTg ON SCHEMATIC 3 




REPLACEMENT ASSEMBLY ACCESSORY NO 111779 






Ac SEEN0TE0NSCHFMATIC3 ,, . 


.1 NOTE ON 


«rKFMATir 






aS «FNnl?^NVM?«AT ?T «E NOTE ON SCHEMATIC 5. 

M HISSuSK^hISmIcI. SEE NOTE ON SCHEMATIC 3 



* « db c w • c un own c i V o. 

•> 1 : SERIAL NUMBERS l62ZACe?»e ANO ABOVE RERlACESOTBZ-tBBO (S020I 










Toble 6-3. Reploceoble Paft$(Cont*d) 



Reference 

Designation 


HP Part Number 


Oty 


Description 


Mfr 

Code 


Mfr Part Number 








CHASSIS MOUNTED PARTS 








3l6IM»«e 


1 


FAN-T6AX DCV 


28480 


3160-0286 




3160-0300 


1 


FILTER. AIR 


28480 


3150 030C 


ci>ce 


0)80-^291 




CARACITQR-FXD lUFt 106 36VOC TA 


66268 


I50O1Q6X6035A2 


CRI 


1MO-0647 




L60-VISIBLE LUM-INT-2MCD IF-20MA-I4AX 


2B480 


1990-0947 


FI 


2M0 0701 


t 


FUSE 2SA 260V SLO-6LO 220/240V OPERATION 


76616 


3I3.250S 




3IIO-0013 


t 


FUSE 6A 2S0V FAST-6LOI00/120V OPERATION 


04703 


312.600 




6061-1131 


2 


TERM ASSEMBLY. REAR INPUT 


2B460 


5061-1131 


J2 


1260 0063 


1 


CONNECTOR-RF 6NC FEM SQL-NOLE FR SO OHM 


24931 


26FR 130-1 


J3 


1261 3263 


1 


CONNECTOR: 24-CONT: FEM. M1CRORI86ON 


26460 


I251-32B3 




0380-0643 


1 


STANDOFF, LG STUOMOUNT (METRIC ThREAOI 


004&A 


080 * 


J4 


9100 3010 


1 


FILTER-LINE 


2B460 


9100 3810 


Ji 


6060-7464 




TERM ASSEMBLY. fROAT INPUT 


26460 


5060-7454 


PI 


t2St 3301 


1 


CONNECTOR 3 PIN F POST TYPE 


27264 


09-50 7031 


n 


136U3067 




CONNECTOR 10 PIN F POST TYPE 


27264 


22-01 2101 


F3 


1261 4312 


1 


CONNECTOR 18-PIN P POST TYPE 


27264 


22-01 2161 




1»1 3476 


17 


CONTACT CONN U/S POST TYPE FEM CRP (P/0 P3I 


2B4B0 


1751-3476 


M 


125 1 3277 


1 


CONNECTOR 4 PIN F POST TYPE 


77294 


06-50 7041 


PS 


1261-3276 




CONNECTOR e-PIN F POST TYPE 


27264 


06 50 7051 


pe 


1261 3276 


2 


CONNECTOR S-PfN P POST TYPE 


27264 


06 SO 7051 


SI 


3100 3380 


1 


'SWITCH. ROTARY INPUT SELECT 


28460 


31W 3380 




0370 1103 


1 


KNOB 


?M0 


0370 1103 




3030-0007 


1 


SCREW-SET 4 40 .12S IN-LG 


2S460 


3030-0007 


S2. S3 


3101-0061 


2 


SWITCH-$1 SPOT-NS UINTR .SA 12SVAC/DC PC 


79727 


G-124 0013 


S« 


3101-2043 


2 


SWITCH-Sl OPOT-NS STD 2A 2S0VAC SLDR LUG 


264B0 


3101-2042 


ss 


3101-2042 




$WITCH-$L OPOT-NS STD 2A 250VAC SLDR LUG 


29480 


3101 2042 


se 


3101-2216 


1 


SWITCM-P6 OPOT 4A 250V AC 


28480 


3101 2215 




$040-7023 


1 


PUSH ROO 


284B0 


5G40 7023 


S7 


3101-1206 


1 


SWITCH -P8 OPOT ALTP4G .^A 115VAC PC 


28480 


3101-1299 




0370'0683 


1 


PUSHBUTTON. OLIVE BLACK 


28480 


0370 0683 


TJ 


9100* 0680 


1 


TRANSFORMER, POWER 


78480 


9100 0680 


U1 


1820 -0430 


1 


IC LM 309 V RGLTR 


27014 


LVtaOBK 




0340 0660 


1 


IN$ULATQA-X$TR RUBBER RED 


8C464 


7403 10-02 




1200 0456 


1 


SOCKET-XSTR 2 CONT T1)-3-PKG 


28480 


1200 - 0456 


U2 


1826-0181 


1 


rc LM 323 V RGLTR 


27014 


LM323K 


U3 


1826-0117 


1 


l€ 7812C V RGLTR 


07263 


7812KC 




I200'0479 


2 


SOCXET-XSTH 2-CONT TO-3 SLOR-TUR 


61633 


4601 


W1 


03456-61603 


1 


CABLE ASEEWdtY. VOLTS 


26480 


03455 61603 


w? 


03456-61604 


1 


CABLE ASSEMBLY. OHM 


28480 


03455 61604 


W3 


03466-61606 


1 


CABLE ASSEM8LY, HP IB (INCLUDES J3 AND P3l 


28480 


03456-61606 


WS 


03456 61606 


1 


CABLE ASSEMBLY. POWER 


78480 


034S5 61605 


XP1 


2110-0470 


X 


FUSEHOLDER-EXTR POST 20A 200V UUIEC 


7&ei$ 


345003-010 




6041-0306 4 


2 


KEY CAP-UNL PTYGRY 


28480 


5041-0306 




6041 -0138 


1 


KEY CAP- UNL MG I08SI 


78480 


6041 0130 




6041 0318 3 


21 


KEY CAP-L PTYGRY 


28480 


5041-0318 




6041-0144 


1 


KEY CAP- 1 MOSGRY 


26460 


5041-0144 




6041 -0267 OA 


1 


KEY -CAP UNL 


26460 


5041 0267 




6041 0460 


2 


KEY CAP-L SCABLU 


28460 


5041-0450 




5040 6867 


1 


LENS. LEO 


28460 


5040 6697 




6041 0376 4a 


3 


KEY CAP- UNL 


7B480 


5041 0376 




S040-666e 


n 


LITE PIPE 


26460 


5040 5686 




7120-6410 


1 


WARNING LABEL 5O-60HZSELECTION 


28460 


7120-6410 


•* SCPfACNU 


UetRS 1622A0O411 AND ABC 


Ve HEFLAC 


:s PARTS S04I-013B ANO S041 ^144 






•»A SCflIAL NUUeCfiS 1622A07436 AN0A60VE HCnACSS 034SM>4303 






3B SERIAI NU 


VIOtRS 1822A05831 AND A8C 


VE REPLAC 


ES PART 5000 7454 























Table 6-3. Replaceable Parts 



Reference 

Designation 


HP Part Number 


OtY 


Description 


Mfr 

Code 


Mfr Part Number 




502>ae»l 


■■ 


•P60NI PKAH£ 


26460 


5020-6601 


HU 


302k>«M32 




sm siKuis 


26460 


soED-aasE 




5020- 0« 92 




•466R fHAHt 


26410 


5020-6602 




5060- 9«i5 




1UR CUftR 


26AB0 


506D-9695 




5060-9647 




60MW COVER 


26460 


5040-0647 




S0t»-«8>» 


2 


45S06 COVER A9SEA61V 


26460 


5040-6674 


Hft 


5060-9«04 


2 


5fR6P HANDLE e 11* 


26460 


5040-6604 


H¥% 


>040-7219 


2 


5TRAP HANDLE a CAP# FRON1 


26410 


9040-7216 


H?H 


ilt*^UZ9 




6T«AP HANDLE • CAP* REAR 


26460 


5040- 7220 


HPUt 


5040-7204 




pool 


2BAB0 


5040-7201 


HPli 


14«0-1M> 




MilCFUWI >>16 SSt 


26460 


1440-1945 


HPiZ 


>001- 0436 




TMIM »IMP 


26460 


soat-OATa 




5U40-7202 




iRlNf TOP 


26410 


S0AO-TE02 


HPlh 


0J455-O4i02 




PANEL. FUMi. cncss 


26460 


03455-04902 


A»»4» 


09455-00204 




MM'FAHiL. FMWt 


26460 


OJBSB-OUOA 


NPi6 


41 14-0644 




•■INOUN OISPIAT 


26460 


4114-0441 


Hfil 


03*S»-0U40t 




OUARO ASSEN6LV 


26460 


O34SS-SM0I 


APIA 


0i455-00401 




OUARDv NAIN 


26460 


03455-00101 




0409-0141 




MIJE-FC *0 aiA PDLVC .0A2-eD-lHKNS 


26460 


0409-0141 




04 09-0152 


2 


eUI»E-FV BD BLN POL VC .OB2-BO-THKNE 1-LC 


26460 


0409-01 52 




1400-0574 


1 


nOCRINO 6IRAP 


26460 


1400-0574 


AP49 


uJU3-m)10j 


1 


CiMBD. ilUE 


2BAB0 


03A33-0010E 


MnO 


0405 0162 
03466 -00603 


1 


GUIDE-PC BO BIK POL VC On-BO-THKNS l-LG 
SHIELD, *.C CONVERTER 


26480 

26460 


0403 OIK 
034»-00e03 


AP^I 


OJ455-V1203 




BBACAET. FT TEU 


26460 


03433-01203 




034SS-08IOT 


1 


COVER. V0LIA6E hEGULATOR 


26460 


03433-0410T 


H9Z» 


09455-01201 


1 


MACRETt REE6RENCE 


26460 


03433-01201 


HP^4 


04 09-0141 
09455-00602 


i 


COIOE-PC eO 6LR PQUC .062-60- IHRN 5 
9HIEL0. LT ISOLATOR 


26460 

26460 


0409-01 41 
09455-00402 


AP^> 


09455-04102 


1 


COVER. SOItGH 60 


ZBABB 


09455-04102 


MP^« 


09455-04101 


1 


COVEB. TOP CD (AVERAGE AC CONVERTER) 


26460 


09455-04101 




0 9 455-04106 


1 


CDVEB. TOP CUAROIRUS AC CONVERTER) 


26460 


09495-04106 




09495-04106 


1 


COVER. AC CAL 


26460 


09455-04104 




a»4ss-ouo* 


i 


MUUVTJNC 6HACR6T. 0UT6D 


26460 


03433-01204 




09455-01101 


1 


HEAl SINR 


26410 


09455-01101 




09455-00109 


1 


CVSSEI 


2BABD 


09455-00109 




Sri4o-8oai 


4 


INSULATOR. SLIDE 


26460 


5040-6081 




09455-04901 


1 


PLATE. SLIDE 


26460 


09495-04901 




09455-00601 


1 


COVER* LINE 


26460 


09455-00401 


HPi3 


09455-01202 


1 


6RACRET. TRANSFORMER 


26460 


05455-0UQ2 


HFik 


09455-00301 


1 


PANEL ASSEHNLV. REAR 


26460 


09455-00901 


KPi» 


09455-04109 


1 


OUOB. BEFERENCE 


26460 


03433-041 03 




1940-024? 


1 


PASTE HER-CPTVE SCR ASST PANEL TWINS 


26460 


1390-024T 




6 19/B70 




















Model 34S5A 



Section Vll 



SECTION VII 
MANUAL CHANGES 



7-1. INTRODUCTION. 

7-2. This section of the manual normally contains informa- 
tion necessary to adapt this manual to instruments for 
which the content does not directly apply. Since, at this 
printing, the manual does apply directly to instruments 
having serial numbers listed on the title page, no change 
information is given here. 



7-1/7-2 




Model 3455A 



Section VIII 



SECTION VIII 
SERVICE 



B-1. INTRODUCTION. 

8-2. This section contains theory of operation, trouble- 
shooting procedures, safety considerations, and general 
service infomation for the Model 34SSA Digital Volt- 
meter. 

8-3. SAFETY CONSIDERATIONS. 

8-4. Although this instrument has been designed in accor- 
dance with international safety standards, this manual 
contains information, cautions, and warnings which must 
be followed to ensure safe operation and to maintain the 
instrument in safe operating condition. Service and adjust- 
ments should be performed only by qualified service 
personnel. 

8-5. Any adjustment, maintenance, and repair of the 
opened instrument while any power or voltage is applied 
should be avoided as much as possible, and, when inevit- 
able, should be carried out only by a skilled person who is 
aware of the hazard involved. 

WARNIN^ 

Any interruptiun of the protective grounding 
conductor {inside or outside the instrument) or 
disconnection of the protective earth terminal 



is likely to make the instrument dangerous 
Intentional interruption of the protective 
grounding conductor is strictly prohibited. 

8-6. It is possible for capacitors inside the instrument to 
still be charged even if the instrument has been discon- 
connected from its power sources. 

8-7. Be certain that only fuses with the required current 
rating and of the specified typed (normal blow, time delay, 
etc.) are used for replacement. Tlic use of repaired fuses 
and the short-circuiting of fuse holders must be avoided. 

j«arnin£^ 

The service information presented in this 
manual is normally used with the protective 
covers removed and power applied to the 
instrument. I'nergy available at many points 
may, if contacted, result in personal infury. 

8-8. RECOMMENDED TEST EQUIPMENT. 

8-9. Test equipment required to maintain the Digital Volt- 
meter is listed in Table 1-3. Equipment other than that 
listed may be used if it meets the listed critical specifica- 
tions. 




Figure 8-1. Function Block Diagram. 



8-1 



















Section Vllt 



Model 3455A 



THEORY OF OPERATION 



8-10. INTRODUCTION. 

8-11. The following paragraphs contain both agcneraland 
detailed description of the methods and circuits used in the 
Model 34S5A Multimeter. The general description explains 
the basic purpose of each block of the functional block 
diagram shown in Figure 8-1. The detailed description 
describes the methods and pertinent circuitry used to 
accomplish the function of each block of the detailed block 
diagram. 

8-12. INPUT SWITCHING AND DC ATTENUATOR. 

8-13. General. 

8-14. The front or rear input terminals of the 34SSA arc 
selected by a two-section rotary switch located on the 
rear panel of the instrument. Reed relays are used to per- 
form all internal input switching where voltages greater 
than 17 volts may be encountered. All other input switch- 
ing is done with FF.T switches. 

8-15. Detailed Description. 

8-16. Refer to Figure 8-2. Simplified Input Switching E)ia- 
gram. The front or rear inputs for ‘'Volts”, “Ohms” and 
"Guard” are selected by rear panel switch SI. Relays K3 
and K9 connect the Ohms Converter to the "Ohms Signal” 
terminals. Relays K2 and K4 are used to convert the Multi- 
meter from 4-wirc to 2-wire ohms measurement capability. 



The "Input" terminals are connected to the dc preampli- 
fier input on the .1 V dc thruugli 10 V dc and all ‘Ohms” 
ranges by relay K1 and FFT switch Ql. Relay KS connects 
the input to the operational attenuator on the 100 and 
1000 V dc ranges. Output of the Attenuator is connected 
to the input of the dc preamplifier by FET switch 01 S on 
the 100 V dc range and by FET switch Q16 on the 1000 V 
dc range. The AC Converter output is connected to the dc 
preamp input by FET switch Q3. 

8-17. Operational Attenuator. 

8-18. The Operational Attenuator provides a fixed attenu- 
ation of 10-to-l on the 100 V dc range or IOO-to-1 on the 
1000 V dc range. Figure 8-3 shows a simplified diagram of 
the attenuator. The circuit operates as a conventional oper- 
ational amplifier with fractional gains of .1 and .01. A gain 
of I is selected by FET switch Q38 when the attenuator is 
not in use. The amplifier input is protected from overload 
by diodes CR27 and CR28. Output of the amplifier is 
limited to approximately plus or minus 17 V dc by protec- 
tion diodes CR29 throu^ CR31. 

8-19. AUTO CALiBRATION-DC VOLTAGE. 

8-20. General. 

8-21. The purpose of the Auto Calibration sequence is to 
eliminate offset and gain errors which may he present in the 




8-2 



Figure 8-2. Simplified input Switching Diagram. 






Model 3455A 



THEORY OF OPERATION 



Section VIII 




Figure 8-3. Operational Attenuator Diagram. 



analog circuitry of the Voltmeter. This is accomplished by 
measuring the offset and gain errors and mathematically 
correcting for them. Each error measurement is stored in 
“memory” by the main controller as a constant. These 
constants are sequentially updated. The output reading of 
the Voltmeter is computed by the Main Controller and is 
equal to the ratio of the external input to the internal refer- 
ence, times a range factor. Figure 8-4 shows a very basic 
diagram of the Voltmeter. 




A basic equation describing a measurement of one of the 
three inputs is: V( ) = (E( ) + Eq)G ; where V( ^ is the par- 
ticular output, E( ) is one of the three inputs. Eq is the 
internal offset error, and G is the circuit gain. Closing 
switch SI applies the internal reference voltage. The circuit 
output would be: Vjef = (Eref * ^O) offset error is 

measured by closing S2, grounding the input. The resultant 
output would be Vg = EqG. Measurement of the external 
input would yield Vjn = (Ejn + EoX*- The equation describ- 
ing the Auto-Calibration is: 

Output Reading® _ fh ' x Kr 
Yref' Yq 

Substituting the basic equations into the Auto-Cal 

equation would yield: 

Output Reading = Eq) G • EpC 

(Etef * Eg) G - EgG 

This equation reduces to: 

Output Reading ® x 

Eref 

or: the output reading is equal to the ratio of the 




8-3 









Section VIII 



THEORY OF OPERATION 



Model 3455A 



external input voltage to the internal reference volt- 
age times the range factor (Kf). 

8-22. Circuit Description. 

8-23. Figure 8-S shows a simplified schematic of the auto- 



cal switching circuitry. The following paragraphs describe 
circuit operation for the various auto-cal measurements. 

8-24. 10 V dc Input Offset Error Measurement. Figure 8-6 
illustrates the circuit configuration for making the 10V dc 




Figure 8-€. 10 V dc Input Offset Error Measurement. 




8-4 








Model 3455A 



THEORY OF OPERATION 



Section VIII 



Offset Error Measurement. The DC Preamp input is 
grounded through a 100 kjlohm resistor by FET switch 
AI0Q2. A DC Preamp gain of XI is selected by FET switch 
A10Q19. The resultant measurement is the offset voltage 
present on (he 10 V dc range. This number is stored by the 
main controller for use in correcting measurements made 
on the 10 V dc range. 

8*25. 1 V dc and .1 V dc Input Offset Error Measurensent. 
Offset error measurements on the 1 V dc and . 1 V dc ranges 
arc made in the same manner as the 10 V dc range except 
for IX Preamp gains of XIO for the I V dc range and XI 00 
for the .1 V dc range. The circuit configuration for the I V 
dc Offset Error Measurement is shown in Figure 8-7. A DC 
Preamp gain of XIO is selected by FET switch A10Q2I. 
Figure 8-8 shows the circuit configuration for making the 
.1 V dc Offset Error Measurement. In this case, the feed- 
back path for the DC fVeamp is through Amplifier A10U3, 
which has unity gain. FET switch Q27. the precision 10-to- 
1 divider (A 1 1 R7 and A 1 1 R8) and FET switch A I OQ 1 8 for 
a gain of 100. The resultant measurements arc stored by the 
main controller to correct measurements made on (he .1 V 
dc and I V dc ranges. 

8-26. 100 V dc and 1000 V dc Input Offset Error Measure- 
ment. On the 100 V dc and 1000 V dc ranges the input of 
the operational attenuator is grounded through a 100 kil- 
ohm resistor by relay A10K6 and FET switch A10Q34 (see 
Figure 8-9). On the 100 V dc range, the feedback of the 
operational attenuator is selected by FET switch A10Q3S 
(attenuation of 10-to-l). The output of the operational 
attenuator is applied to the input of the DC Preamp 



throu^ FET switch AIOQIS. Attenuator feedback on the 
1000 V dc range is selected by FET switch A10Q39 (atten- 
uation of 100 to 1) and is applied to the DC Preamp input 
through FET switch A10QI6. DC Preamp gain is XI for 
both error measurements. 

8-27. 10 V dc Gain Error Measurement. On the 10 V dc 
range the gain error measurement is made by applying the 
internal reference voltage (-*- 10 V dc), throu^ a 100 kil- 
ohm resistor and FET switch A1004, to the input of the 
DC Preamp (see Figure 8-10). A EX Preamp gain of XI is 
selected by FET switch A10Q19. The measurement result 
is stored by the main controller as the 10 V dc full scale 
constant. 



8-28. .1 V dc and 1 V dc Gain Error Measurement. On the 
1 V dc range, the reference voltage is applied to the DC Pre- 
amp input through the precision ten-to-one divider (AI 1 R7 
and R8)by FET switches A10Q31 and A10QI6(sec Figure 
8-11). The lower end of the ten-to-one divider is held at 
virtual ground by closing FET switch AI0Q38. Output of 
the ten-to-one divider is I V dc. A DC Preamp gain of XIO 
is selected by FET switch A10Q21. The measurement result 
is stored by (he main controller as the I V dc full scale 
constant. 

8-29. A separate gain error measurement is not made for 
the .1 V dc range. Since the only difference between the 
1 V dc and .1 V dc circuit configuration is a precise gain of 
ten, the .1 V dc gain error constant is computed by the 
main controller. 




8-5 




Section Vlll 



THEORY OF OPERATION 



Model 3455A 



8-30. 1 V dc Reference Offset Error Measurement. Since separate offset Error measurement is made to include any 

the I V dc full scale reference was derived by dividing the offsets present in the ten-to-one divider and associated 

internal reference by the precision ten-to-one divider, a circuitry. Figure 8-12 illustrates the circuit configuration 




Measurement. 




8-6 










Model 345SA 



THEORY OF OPERATION 



Seciion VIII 



for the I V dc Reference Offset Error Measurement. The 8-31. 100 V dc and 1000 V dc Gain Error Measurement, 

input of the DC Preamp is grounded through the len-to-onc Figure 8-13 shows the circuit arrangement for making the 

divider by FET switch AI0Q16. Preamp gain is XIO. 100 V dc gain error measurement. The reference voltage is 




Figure 8-1 1. .1 V dc ar>d 1 V dc Gain Error Measurement. 




Figure 8-12. 1 V dc Reference Offset Error Measurement. 



8-7 







SecUon VIII 



THEORY OF OPERATION 



Model 3455A 



connected to the input of the operational attenuator is connected to the E>C Preamp input by FET switch 

through FET switch A10Q33 and relay AI0K6. The attenu- A10Q15. A DC preamp gain of XIO is selected by FET 

atur is set to a gain of 0.1 (10 to I attenuation) by FET switch AI0Q21. The measurement result is stored by the 

switch AI 0Q3S. The output of the operational attenuator main controller as the lOO V dc gain error constant. 




Figure 8-13. 100 V dc and 1000 V dc Gain Error Measurement. 




Figure 8-14. 100 V dc Reference Offset Error Measurement. 



8-8 









Model 34SSA 



THEORY OF OPERATION 



Section VIII 



8-32. A separate gain error measurement is not made for 
the 1000 V dc range. Since the only difference between 
the 100 V dc and 1000 V dc circuit configuration is a 
precise attenuation difference of 10, the 1000 V dc gain 
error constant is computed by the main controller. 

$•33. 100 V dc Reference Offset Error Measurement. 
Since the reference voltage for the 100 V dc range is 
divided by the operational attenuator; a separate offset 
error measurement is made to include any offsets which 
might be associated with the attenuator and FbT switches 
used. Figure 8-14 illustrates the circuit configuration for 
this measurement. 

8-34. AUTO-CALIBRATION -OHMS. 

8-35. General. 

8-36. During the ohms function the ohms converter sup- 
plies a current through both the unknown resistance and 
the reference resistance (see Figure 8-15). Since the same 
current flows through both resistors, their respective volt- 
age drops are proportional. As with the CC Auto-Cal 
sequence, the offset errors are measured and subtracted 
from the unknown and reference resistance measurements. 
The voltage developed across the unknown resistor is mea- 
sured by closing SI while the reference voltage, developed 
across the reference resistor, is measured by closing S2. The 
value of the unknown resistance is computed by the main 
controller. An equation describing this computation is: 

-HVRx + 6o>Gi -EoGil 

R„ Kr 

IVrEF * Eol G2 - Eo Ga 




Figure 8-15. Basic Ohms Measurement Diagram. 



where Rx is the unknown resistance value, V(^x is the volt- 
age drop across the unknown resistance, V|^ ref. is the volt- 
age drop across the reference resistance, is (he input 
offset error. G| and G 2 are the circuit gains of the particu- 
lar measurements, and fCr factor. This equation 

simplifies to: 



, VRx Cl 
VreF G2 



Kr 



8-37. Circuit Description. 

8-38. .1 kn, 1 kf2, 1 Mf2 Offset Error Measurements. The 
offset error constants derived for the .1 V dc and I V dc 
ranges are also used for the .1 kf7, 1 kfl, and 1 Mf2 offset 
error constants, since the circuit configurations are the 
same. Refer to Paragraph 8-25 for a description of these 
offset error measurements. 



8-39. 10 kn, 100 kn, 10 Mn Offset Error Measurements. 
Two additional offset measurements are made to compen- 
sate for errors which might be present when making mea- 
surements on the 10 kn, 100 kn, or 10 Mn ranges. Figure 




8-9 







Section VIII 



THEORY OF OPERATION 



Model 3455A 




Figure 8-17. Ohmt Reference Meaiurement. 



Notei: VOLTAGE LIMITED TO 5 V. FET Switch A10Q13. The reference is measured prior to 

8-16 illustrates the circuit configuration for these measure- each measurement of the unknown resistance, 
ments. The DC Preamp input is grounded through a 100 kf2 

resistor by FET switch A10Q2. The feedback path for the 8-41, 100 1 10 Mf2 Reference Measurements. On 

X2 gain is through FET switches A10Q22 and A10Q21. the 100 kJ2 range, AI0K7 is opened and the .7 mA current 

Feedback for X20 gain is through A10Q22, isolation amp- source is applied to the combination of R1 and R5 (1 M£2). 

lifier AI0U3, switch A10Q27, the precision 10-to-l divider The reference voltage developed across R1 and R5 is ap- 
and switch A10Q18. A separate measurement is made for plied to the DC Preamp input through FET switch 

both gains and the results are stored by the main controller. A10Q14. On the 1 MJ2 and lOMD ranges, relay A10K8 is 

8-40. .1 kSl, 1 kn. 10 kf2 Reference Measurements. The ‘^e .7 M current source is applied to the 1 Mfi 

ohms reference voltage is developed across the reference reference resistance. The reference voltage is applied to 
resistance. On the .1 kfi through 10 kfl ranges the refer- ^ Preamp input through A10Q14. 

ence resistance is I kJ2 (see Figure 8-17). The .7 mA 

current source is connected to the I kJ2 reference through 8-42. AUTO CALIBRATION— A/0 CONVERTER, 
relay A10K7. The 999 kfi reference resistor is shorted 

by the combination of relay AI0K7 and AI0K8. The refer- 8-43. Two Auto-Cal measurements are made to correct 

ence voltage is applied to the DC Preamp input through errors which might be generated in the A/D Converter. One 




Figure 8-18. Simplified A/D Converter Diagram. 



8-10 








Model 34SSA 



THEORY OF OPERATION 



Section VIII 



measurement is made to correct for offsets. The second 
measurement is made to conect for any difference between 
the plus and minus "run-down” current references. 

8-44. Circuit Description. 

8-45. Offset Error Measurement. Figure 8-18 shows a 
simplified schematic of the A/D Converter. During the 
offset error measurement all input switches to the inte- 
grator are opened. During the integration period, the inte- 
grator is permitted to charge to a voltage equal to any off- 
set current present in the integrator circuit. At the end of 
the integration period the integrator is "run-down” and 
the offset digitized and stored as the A/D Converter offset 
error by the main controller. 

8-46. Current Ratio Measurement. During the current 
ratio measurement the plus and minus references are 
applied to the input of the integrator through diode switch 
Uld and U2d. The references are switched at a 1 milli- 
second rate during the integration period (133 milli- 
seconds). At the end of the integration period, the accumu- 
lated charge on the integrator is “run-down” digitized and 
stored as the current ratio constant. The purpose of this 
measurement is to correct for any imbalance between the 
positive and negative current references. 

8-47. TRUE RMS AC CONVERTER. 

848. General. 

8-49. The rms converter uses operational circuitry, rather 
than a thermal element, to convert the ac signal to a dc 
level equivalent to the rms value of the input signal. Use of 
the operational rms converter permits faster ac measure- 
ment rates. The frequency range of the true rms converter 
is 30 Hz to 1 MHz during normal operation and 300 Hz to 
1 MHz during fast ACV operation. Full scale output of the 
rms converter is 6.6667 V dc. Figure 8-19 is a simplified 
schematic of the true rms converter. The mathematical 



expression de scribing the measurement of an rms level is 
V output = >/ V in ‘ which states that the output voltage 
(Vo) is equal to the square root of the average of the abso- 
lute value of the input voltage (Vip) squared. The circuitry 
used in the rms converter solves for the expression 




which is identical to 




8-SO. Circuit Description. 



8-51. AC Input Attenuator. The Input attenuator of the 
rms converter is an RC circuit which provides a fixed 
attenuation of 100-to-l on the 100 V ac and 1000 V ac 
ranges. Attenuator switching is performed by reed relays 
which are controlled by the inguard controller. 



8-52. Input Amplifier. An operational amplifier with fixed 
gains of xl and xO.l is used as the input amplifier. The 
combination of amplifier gain and input attenuation are 
used to maintain a full-scale output of 1 V rms from the 
input amplifier. Table 8-1 shows the input attenuation and 
amplifier gain combinations used on each range. 



Table 8-1. AC Converter Ranging. 



Voltage 

Range 


Input 

Attenuation 

Factor 


Ampliiier 

Gain 


Total 

Cain 


1 V 


1 


1 


1 


10 V 


1 


0.1 


0.1 


100 V 


.01 


1 


0.01 


lOOOV 


.01 


0.1 


0.001 



8-53. Absolute Value Amplifier. The absolute value ampli- 
fier, as the name implies, solves for the absolute value of 
the signal input to it. The operation of this circuit is similar 
to a full wave rectifier. That is the negative portion of the 
signal is inverted and combined with the positive portion. 
The resultant positive signal is applied to the input of the 
squaring amplifier. 




8-11 





Section VIII 



THEORY OF OPERATION 



Model 3455A 



8-54. Squaring Amplifier. The squaring amplifier is a log 
amplifier circuit which takes the log of the input voltage, or 
in this case since there are two transistors (Q9 A and QUA) 
in the feedback loop, takes twice the log of the input 
voltage. Therefore, the output of the squaring amplifier is 
equal to 2 log I V in I or log 1 V in I * . 

8-55. Square Root and Averaging Amplifier. The square 
root amplifier reverses the action of squaring amplifier. 
The input to the amplifier is through logging transistors 
QllB and Q9B. Output of the square r oot ampli fier is 
equivalent to 1/2 log IV in I* or log V ■ V In I ^ . The 
operations of the square root amplifier and the averaging 
amplifier are simultaneous and inter-dependent. The com- 
bined output of the two circuits is a dc level proportional 
to the rms value of the input signal. 

B-S6. AVERAGE RESPONDING AC CONVERTER 
(Option 001). 

8-57. General. 

8-58. The average ac converter is an average responding cir- 
cuit calibrated to the rms value of a sinusoidal input. Full 
scale output of the converter is 6.6667 V dc for all ranges. 
Figure 8-20 shows a simplified schematic of the converter. 

8-59. Circuit Description. 

8-60. AC Input Attenuator. The ac input attenuator is an 
RC circuit which provides a fixed attenuation of 100-to-l 
on the 100 V ac and 1000 V ac ranges. Attenuator switch- 
ing is done by reed relays which are controlled by the 
inguard controller. Input resistance of the AC Converter is 
approximately 2 megohms. 



8-61. Converter Amplifier. The converter amplifier uses a 
dual FET input stage to maintain a high input impedance. 
An operational amplifier provides the necessary gain to 
drive the output stage of the converter amplifier. The out- 
put stage of the amplifier is a current driver circuit. Two ac 
feedback paths provide fixed gains of 1 or 0.1. An integrat- 
ing amplifier (U4) is used to maintain a dc level of 0 V dc at 
the output of the Converter Amplifier. The integrating 
amplifier also determines the low frequency cut-off point 
of the Converter Amplifier. (The cut-off frequency is ap- 
proximately 300 llz on the FAST ACV mode and 30 Hz on 
the ACV mode.) A diode protection circuit is used to limit 
the output of the Converter Amplifier to approximately 
± 6 V peak to prevent saturation of the amplifier. 

8-62. AC Ranging. AC ranging is accomplished by attenu- 
ating the input signal and changing the gain of the converter 
amplifier. The input attenuator provides a fixed attenuation 
of 100 to 1. The Converter Amplifier has fixed gains of 1 
or 0.1. Table 8-1 shows the various combinations of amp- 
lifier gain and input attenuation necessary for the input 
voltage ranging. Full scale output of the Converter Amp- 
lifier is approximately 1 volt rms for all ranges. 

8-63. Rectifier and Filter Amplifier. The output of the 
Converter Amplifier is applied to a rectifier circuit which 
produces both a positive going and a negative going half- 
wave rectified signal output (sec Figure 8-20). The rectified 
signals are summed to provide ac feedback for the Con- 
verter Amplifier. The Filter Amplifier has a fixed gain of 
approximately 6.6. The feedback circuitry of the Filter 
Amplifier provides one pole of filtering. The output of the 
Filter Amplifier is applied to a one pole RC filter network 
for FAST ACV operation and a two pole RC filter network 
for ACV operation. 




Figure 8-20. Simplified Average Responding AC Converter. 



8-12 






Model 34SSA 



THEORY OF OPERATION 



Section Vlll 



8-64. Output Buffer Amplifier. An Operational Amplifier 
with unity gain is used to isolate the output of the AC Con- 
verter. Full scale output of the AC Converter is + 6.6667 V 
dc for all ranges. 

8-65. OHMS CONVERTER. 

8-66. General. 

8-67. The Ohms Converter is a voltage limited current 
source which supplies a constant current through the 
unknown and reference resistors until the output voltage 
reaches approximately 4.7S volts dc. At this point the con- 
verter becomes a constant voltage source. During the cur- 
rent mode of operation the converter supplies a constant 
current of .7 mA on the 100 ohm through 100 kilohm 
ranges or .7 microamps on the 1 and 10 megohm ranges. 
The converter becomes a constant voltage source when 
measuring resistance greater than S.8 kilohm on the 10 and 
100 kilohm ranges and greater chan 5.8 megohm on the 10 
megohm range. Since the same current flows through both 
the unknown resistance and the reference resistance, the 
voltage drops across them are directly proportional. The 
unknown resistance value is the ratio of the voltage drop 
across the unknown resistance times circuit gain to the 
voltage drop across the reference resistance times circuit 
gain multiplied by the range constant ; or 

Vref G2 



8-68. Circuit Description. 

8-69. Ohms Converter Power Supply. An inverter circuit 
is used to derive power for the ohms converter. The inverter 
operates at a frequency of 30.72 kHz on 60 Hz operation 
or 2S.6 kHz on 50 Hz operation. Transformers AlOTl and 
AI2T1 provide complete isolation of the ohms converter. 

8-70. Current Source. Figure 8-21 shows a simplified sche- 
matic of the current source used in the ohms converter. The 
circuit is designed to provide an output current of .7 mA or 
.7 pA. Output current is determined by resistors R3, RS, 
and R6. During the .7 mA mode of operation, (100 ohm 
through 100 kilohm ranges) relay K8 shorts resistor R3. 
The output current is then determined by R6 and is equal 
to the reference voltage (+ 6.2 V) divided by the resistance 
of R6, or l<j = 6.2/8.87 K = .7 mA. During the .7 pA mode 
of operation. (1 megohm and 10 megohm ranges) both K7 
and 1C8 ate open. Resistors R5 and R6 form a divider which 
divides the + 6.2 V reference to + .7 V. The output current 
is now determined by the .7 V across R3 or Iq = .7 V/1 M 
= .7 pA. Operational Amplifier U1 drives output transistor 
Q4 and provides the gain necessary to maintain the proper 
output current. Relay K7 is used to select a reference 
resistance of 1 kilohm for the . 1 kilohm through 1 0 kilohm 
ranges or I megohm for the 100 kilohm through 10 
megohm ranges. Both the reference resistance and the 
unknown resistance are in the feedback circuit of the 
operational amplifier. 




Figure 8-21. Ohms Converter Current Source. 



8-13 







Section VIIl 



THEORY OF OPERATION 



Model 3455A 




8-71. Voltage Limit. Figure 8-22 shows a simplified sche- 
matic of the voltage limit circuit used in the ohms con- 
verter. During the current mode of operation the non- 
inverting input of U2 is positive, as referenced to ohms 
ground. In this mode the positive output of U2 is blocked 
by CRM, making the voltage limit circuit inoperative. As 
the resistance of Rx is increased the coUector voltage of Q4 
becomes more negative. This change is coupled to the non- 
inverting input of U2 through the voltage divider composed 
of RI4 and R23. As the input of U2 approaches 0 V the 
output reverses polarity and forward biases CR14. At this 
point U2 takes control of output transistor Q4 and main- 
tains a constant voltage of approximately - 4.7 V dc at the 
collector. During the time the ohms converter is in the volt- 
age limit mode, transistor Q3 supplies the feedback neces- 
sary to balance the current source circuit (see Figure 8-21). 
The converter operates as a voltage source when measuring 
resistances greater than S.8 kilohm on the 100 ohm through 
100 kilohm ranges and greater than 5.8 megohm on the 1 
megohm and 10 megohm ranges. 

8-72. Overload Protection. The ohms converter is pro- 
tected from the accidential application of high voltage to 
the ohms terminals by diodes (TRl. CR2. CRl 1 and CR12. 
These diodes provide a current path through R23 and the 
ohms reference resistance to dissipate the applied voltage. 
High voltage diode CR8 prevents current flow through Q4 
when a negative voltage is applied to the “High" ohms 
terminal. High voltage transistor Q4 is biased ofT to pre- 
vent current flow when a positive voltage is applied. 

8-73. DC PREAMPLIFIER. 

8-74. General. 

8-75. The DC Preamplifier provides the necessary isolation 
and amplifidation of signals from the dc input, ac or ohms 
converter, and Auto Cal circuits for use in the A-to-D Con- 
verter. The DC Preamplifier is designed to provide high 
input impedance and linear gain characteristics. 



8-76. Circuit Description. 

8-77. Input Circuit. A dual FET(Q17) is used as the input 
to the DC Preamplifier to provide high input impedance. 
The sources of Q17 are driven by a current source (Q24) to 
maintain linear circuit operation. Operational amplifier U2 
provides the gain necessary to drive the output circuit of 
the preamplifier. 

8-78. Output Circuit. The output circuit of the DC Pre- 
amplifier consists of an amplifier (Q7 and Q8) and a current 
source (QI2). Operation of the output amplifier is similar 
to that of an inverting operational amplifier with a gain of 
approximately 30 (see Figure 8-23). The amplifier controls 
the output by shunting current from the current source. 
The output circuit drives the DC Preamplifier feedback cir- 
cuitry and the A/D Converter. 

8-79. Feedback Circuit. The feedback circuitry for the DC 
Preamplifier consists of two 10-tu-l resistive dividers, a 
bulTer amplifier, and FET switches. Figure 8-24 shows a 
simplified schematic of the feedback circuitry and lists the 
various switch closures necessary for the particular pre- 
amplifier gains. Buffer Amplifier U3 is a precision XI Amp- 
lifier used to isolate the output divider from the precision 
10-to-l divider. 

8-80. Overload Protection. The preamplifier circuit is pro- 
tected from saturation by diodes CR4 and CRS. These 
diodes limit the voltage difference between the drains of 
Q17. The output of the preamplifier is limited to approxi- 
mately t 17 V by Zener diode CR7 and diode CR6 clamp- 
ing the output stage of U2. 

8-81. Switch Bias Amplifier. The switch bias amplifier sup- 
plies a gate bias voltage for the FF.T switches to make the 
gate-to-source voltage equal to zero during the time the 
FtT switches are ON. The bias amplifier has a unity gain 
and uses an FET input to prevent loading of the input 
signal. Output of the bias amplifier is coupled through 100 
kilohm reistors to the gates of the input switching FET's. 



8-14 






5 








Section Vlll 



THEORY OF OPERATION 



Model 3455A 







Figure 8-25. Simplified Voltage Reference Diagram. 

8-82. REFERENCE ASSEMBLY. 

8-83. General. 

8-84. The reference assembly for the 3455A contains the 
components and adjustments for the ohms converter refer* 
ence resistance, the precision cen-to-one divider, and the 
+ 10 V dc reference voltage. The reference assembly is 
designed to be removed from the Multimeter for calibration 
and contains all adjustments for the DCV and OHMS func- 
tions. 

8-85. Circuit Description. 

8-86. The ohms reference circuit is an adjustable resistive 
network which supplies a precise 1 kilohm or I megohm 
reference. The precision ten-to-one divider is an adjustable 
resistance divider used to produce the 1 volt reference volt- 
age and a precise ten-to-one division for use in the opera- 
tional attenuator and DC preamp feedback circuitry. Figure 
8-2S shows a simplified diagram of the reference voltage cir- 
cuit. The reference for this circuit is a package which con- 
tains a reference diode and heater plus associated circuitry. 
An operational amplifier (U2) provides the necessary gain 
to supply a stable -t- 10 V dc output. Resistors Ra and Rb 
form a voltage divider to provide the proper feedback for 



the operational amplifier. These resistors are a fine-line cir- 
cuit contained in an IC package and are composed of the 
basic resistances plus padding resistors to match the divider 
to the particular reference diode. Resistance Ra also 
includes a potentiometer which is used as the “fine” adjust- 
ment for calibrating the + 10 V dc output. The circuit is 
returned to the • 15 volt supply to reduce ground currents. 

8-87. ANALOG-TO-OIGITAL CONVERTER (A/D). 
8-88. General. 

8-89. The 34SSA Multimeter uses a multi-slope integration 
technique to convert analog input signals to digital informa- 
tion. This method permits relatively high speed, high accur- 
acy measurements. The following explanation of the A/D 
Converter operation uses the integrator output waveform 
pictured in Figure 8-26. The waveform shown is for a nega- 
tive input voltage. For positive inputs the integrator output 
would range between 0 and - 10 volts. This waveform can 
be divided into three major portions: the integration period 
(lime Ti), the run-down period (time T2) snd the auto-zero 
period (lime T3). During time Tj , the input voltage is inte- 
grated and the most significant digits of the output reading 
are determined. During time T2 the input voltage is re- 
moved and the charge remaining on the integrator capacitor 
is used to determine the least significant digits of the 
output reading. During time T3, the integrator is reset to 
approximately 0 volts and readied for the next reading. At 
time T0, the input voltage from the DC Preamp is applied 
to the A/D converter and causes the integrator capacitor to 
charge (period tci ). The rate at which the integrator capac- 
itor charges depends upon the amplitude of the input volt- 
age applied (see Figure 8-27). If the voltage at the output of 
the integrator reaches plus or minus 10 volts the 10 V com- 
parator is enabled and interrupts the inguard controller. 
The controller switches in a reference current opposite in 
polarity amount of time (period td) and causes the inte- 
grator to discharge. At the end of period td, the reference 
voltage is removed allowing the integrator to again charge 
(period tc). This charge, discharge sequence may be 
repeated throughout integration period T]. 

8-90. The period during which the digital counters are 
“counting” occurs during the td cycles. The total number 
of “counts” is therefore dependent upon the number of td 




8-16 






Model 3455A 



THEORY OF OPERATION 



Section VIII 




Figure 8-27. Integrator Output Waveforms for Oifferettt Input Voltage Levels. 



cycles. The number of charge-discharge cycles depends 
upon the input voltage applied (as shown in Figure 8-27) 
and whether the voltmeter is in the S or 6 digit readout 
mode. For the 5 digit mode, time Ti, is 1/60 second (1/SO 
second for SO Hz operation) and approximately 16 charge- 
discharge cycles occur for a full scale input. During 6 digit 
operation, time Ti is increased to 8/60 second (8/50 
second for SO Hz operation), allowing approximately 127 
charge/discharge cycles to occur for a full scale input. 

8-91. At the end of time Tj, the input voltage is removed 
and the reference voltage applied. The integrator is quickly 
discharged at a fixed rate to approximately 0.2 volts 
(period tf). During period the discharge rate is slowed to 
allow accurate zero detection (point of complete dis- 
charge). This type of run-down permits both speed and ac- 
curacy. The “counts” accumulated during the run-down 
period (T 2 ) are scaled and added to those made during time 
T 1 for the final measurement. 



8-92. Circuit Description. 

8-93. Input and Reference Switching. The A/D input and 
reference switching is controlled by the inguard controller. 
The input from the DC Preamp is applied to the integrator 
input through a 19.8 kilohm resistor (RiS) and FET switch 
Q3. The integrator charge current due to the input voltage 
is established by RIS and is equal to the input voltage 
divided by 19.8 kilohms. FET switch Q3 is closed through- 
out the integration period (time T], Figure 8-26) and is 
open during periods T 2 and T 3 . 

8-94. There are four separate current references in the A/D 
Converter. Two of these are positive references and are used 
when the A/D input voltage is negative. The other two 
references are negative references and are used for positive 
inputs. In Figure 8-28 the positive references are shown 
above the integrator input line and the negative references 




8-17 





Section VIII 



THEORY OF OPERATION 



Model 34SSA 



are below. Both (he positive and negative references have a 
••fast” discharge reference and a ••slow” discharge reference. 
The fast discharge references are used during the Id cycles 
of the integration period to discharge the integrator and are 
also used for the “fast run-down” period (time tf). The 
“slow” discharge references arc used during the •'slow run- 
down” period (time 1$) only. Diodes are used to switch the 
references because of their high speed switching ability. 
The following description uses the positive “fast-discharge” 
reference, consisting of Uta, R4. CR2 and Uld, to explain 
the reference switching operation. Except for different 
input levels to (he negative reference switches, operation of 
all reference switching is identical. 

8-95. During (he lime the switch is turned ••off', diode 
CR2 is forward biased by approximately • 2 V dc on (he 
cathode. Current flows from the + 20 volt supply through 
R4 and CR2. Under this condition the voltage at the anode 
of Uld is negative (approximately • 1.5 Vdc)which reverse 
biases Uld, holding it off. (The cathode of Uld is held at 
virtual ground by the integrator.) During the ••on” condi- 
tion. CR2 is reverse biased by applying approximately 
+ 3 V dc to the cathode. Diode Uld becomes forward- 
biased and allows the current to flow through R4 to the 
integrator input. The purpose of diode Ula is to compen- 
sate for the voltage drop across switching diode Uld by 
raising the reference voltage by one diode drop. The refer- 
ence current is determirud by the voltage across R4 (10 V 
dc/IO kilohms^ 1 mA). 

8-96. Integrator. The voltmeter uses a conventional inte- 
grator circuit with a dual FET input stage for isolation. 
Operational amplirwr U3 provides the gain necessary to 
keep the input voltage at 0 V (see Figure 8-29). 

8-97. Slope Amplifier. The purpose of (he ^ope amplifier 
is to increase (he speed of the ••auto-xero” function and 



reduce sensitivity to offsets in the aero detect comparator. 
The slope amplifier is a conventional non-inverting operat- 
(ional amplifier with a gain of 100 and is used to drive the 
auto-zero circuitry and zero detect comparator. Sensitivity 
at (he output of the integrator is approximately .5 milli- 
volts per count of output reading. 

8-98. Auto-Zero. The purpose of auto-zero is to reset the 
integrator to a known level. During this mode of operation 
FF.T switch is closed, completing the auto-zero loop 
through slope amplifier U4. The integrator capacitor (C2) 
is used as the auto-zero capacitor and stores a charge 
equal in amplitude and opposite in polarity to any offsets 
in the integrator and slope amplifier circuits. This charge 
effectively cancels (he offset errors generated by these 
circuits. 

8-99. Zero Detect Comparator. The output signal of the 
zero-detect comparator is used to detennine the polarity of 
(he output reading and which integrator discharge refer- 
ences to apply. The output of this circuit is approximately 
+ 5 volts for negative inputs and near 0 volts for positive 
inputs to the A/D Converter. 

8-100. Absolute Value Amplifier. As the name implies, (he 
absolute value amplifier is a unity gain circuit which pro- 
duces a positive output for cither a positive or negative 
input. During positive inputs, the negative output of U5 
forward biases transistor Q6 allowing it to conduct. For 
negative inputs transistor Q6 is biased off and amplifier US 
conducts through diode CR12. 

8-101. 10 volt Detect Amplifier. The purpose of the 10 
volt Detect Amplifier is to detect when the charge on the 
integrator has reached plus or minus 10 volts. This informa- 
tion is used by the inguard controller in determining when 
to apply the discharge references during the integration per- 




8-18 








Model 3455A 



THEORY OF OPERATION 



Section VIII 



iod (time Ti, Figure 8-26). For inputs less than 10 volts 
the output of the 10 volt Detect j^plifier is near 0 volts. 
As (he Input teaches 10 volts the output switches to 
approximately + 5 volts. 

8-102. 0.2 volt Detect Amplifier. The purpose of the .2 
volt Detect Amplifier is to detect when the integrator has 
discharged to approximately .2 volts during period T 2 
(Figure 8-26). This information is used by the inguard 
controller in determining the point to remove the "fast- 
discharge” reference and apply the "slow-discharge” 
reference. 

8-103. INGUARD CONTROLLER. 



8-104. General. 



8-105. F^ure 8-30 shows the basic steps performed by the 
inguard controller. The inguard controller receives data con- 
taining range, function, and resolution information from 
the main controller. This data, containing 36 bits of infor- 
mation and a parity bit, is transferred serially at a rate 
determined by the main controller. The inguard controller 
decodes the information, sets the input and auto-cal 
switches to their required states, and selects the appropriate 
range, function, and sample time for the resolution indi- 
cated. During the measurement process, the inguard con- 
troller manages the analog-to-digital conversion sequence 
and stores the digital equivalent of the A/D input voltage. 



8-106. Upon completion of the measurement, the digital 
information is transferred from the inguard controller to 







Figure 8-30. Simplified Inguard Controller Flowchart. 



the main controller. This information contains the measure- 
ment value and polarity plus a parity bit and is transferred 
serially at a rate determined by (he main controller. The 
inguard controller is reset to receive mure information by a 
reset pulse from the main controller. 

8-107. Circuit Description. 

8-108. Transfer Circuit. Figure 8-31 shows a simplified 
diagram of the data transfer circuitry between the inguard 
and main controllers. The direct control lines, DCQ) through 
DC3, of the processors arc used for communication. The 
inguard and main processors are electrically isolated by 
optical isolators. Control lines C>C0 and DCI are driven by 
the main controller. During the inguard to main transfer 
mode, Line DC0 is used to indicate when the main control- 
ler is ready to receive data. Control Line DC! is used for 
the transfer-clock signal during both transfer modes. Con- 
trol Lines DC2 and DC3 arc driven by the inguard control- 
ler. Control Line DC2 is used by the inguard controller to 
indicate whether it is in a “send” or "receive” slate. Transi- 
tion from the receive to the send status indicates to the 
main controller when the inguard controller is ready to 
send data. Control Line DC3 is used by the inguard con- 
troller to indicate when it is ready to receive data during 
the main-to-inguard transfer mode and to send data during 
the inguard to main transfer mode. 



8-109. Transfer signals for both data transfer modes are 
illustrated in Figure 8-32. During the main controller to 




8-19 





Section VIII 



THEORY OF OPERATION 



Model 3455A 







FO ^ 

Mn ««0M 1 

HM j 


1 nju~'Li~ 


1 

MT« * 

CLOU _J 


1 f 


mauuc C0HtiOi,ER I ' 
|i»iw iMaivt) J 


II 


- 1 


«*iiM J* 


™ II f 


n 

0*f« TMfrtrCR 

eccoi — « 


1 1 


" T 

■laXIRD CONmOLLCA 


• II p 


n 

Mm noi 


iL _rL_r 


» •«» 



Figure 8-32. Data Transfer Signals. 



Inguard controller transfer mode, data is valid during the 
positive portions of the dock signal and changed during the 
negative portions. During the inguard controller to main 
controller transfer mode, data is valid during the negative 
portions of the clock signal and changed during the positive 
portions. The main controller transfers 37 bits of informa- 



tion, composed of 6 bits of trigger information, 30 bits of 
range and function information and a parity bit, to the 
inguard controller. The inguard controller transfers 25 bits 
of information, composed of I bit of polarity information, 
23 bits of measurement data, and a parity bit, to the main 
controller. 

8-110. Reset Circuit. The reset line is driven by the main 
controller to reset the inguard controller to the beginning 
of its program routine. Figure 8-33 shows a simplified 
schematic of the reset circuit. A pulse transformer is used 
to electrically isolate the reset line between the inguard and 
outguard sections of the voltmeter. The reset pulse applied 
to the preset input of flip-flop U32A sets the “Q” output 
high. The high output of U32A causes the output of U276 
to go low. The output of U27B sets the “interrupt request" 
input of the inguard processor. Upon receiving interrupt 
request, the processor stops driving its data Lines (D0 
through D7), allowing them to go high and sets the inter- 
rupt acknowledge line high. This signal allows the output 
of U27C to go low which puts the “start” address on that 
processor’s data bus. The processor (after reaching its 
“start” address) sets the interrupt acknowledge line low to 
remove the output of U27C from the data bus and to reset 
the interrupt circuit to its normal state. 

8-111. A/D Converter Control Circuitry. Figure 8-34 
shows the control circuitry between the inguard processor 
and the analog-to-digital converter. There are six output 
lines from the inguard controller which control the input, 
reference, and auto-xcro switches in the A/D Converter. 
Each output fine controls one of the six switches in the 
converter. Switching information for the A/D Converter is 
set on the processor's data bus (outputs D0 through DS) 



U 28 A 




Figure 8-33. Inguard Controller Reset Circuit. 



8-20 









Model 34S5A 



THEORY OF OPERATION 



Section VIII 



and transferred to the converter through output latch UlS. 
Table 8-2 describes the purpose of each of the A/D Con- 
verter switch signals and the “true” state of each. The three 
“detect” outputs of the A/D Converter arc returned to 
“direct control” lines DC4 through DC6 of the processor. 



8-112. The “polarity detect” output of the converter is 
also applied to the input of the “:rero detect” circuit. The 
zero detect circuit is used to detect the end of the “slow” 
run-down period. At the beginning of the slow run-down 
period, the “Q” output of U32B is set to the same state as 
the polarity detect signal by a pulse from U14. The inter- 
rupt enable signal from the processor is set high to enable 
the zero detect circuit. As the charge on the A/D Integrator 
passes through 0 volts, the polarity detect signal changes 
state and causes the output of the zero detect circuit to go 
low. The low output from the zero detect circuit sets the 
processor’s interrupt input to stop the A/D Conversion pro- 



Table 6-2. A/D Converter Switch Control Signal 
DeKriptions. 



Signal 


Description 


True 

State 


LVIN 


A/D Convener Input twitch signal 
(A1403) 


Low 


LNRS 


Nagaiive $low<litcharge reference switch signal 
(A14U3c) 


Low 


Hpns 


PMiiive ilow<litcherge reference switch signal 


High 


HAZ 


Auto-zero switch signal (A14Q4) 


High 


HPRf 


Positive fatt-diKherge reference switch signal 
(A14CR2) 


High 


LNRF 


Negative fan^iKharge reference switch signal 
(A14CR6) 


Low 



cess. Upon completion of the A/D Conversion process, the 
processor sets the interrupt enable signal low to disable the 
zero detect circuit. 




Figure 8-34. Simplified A/O Converter Control Circuit. 



8-21 











Section VIII 



THEORY OF OPERATION 



Model 3455A 




Figure 8-35. Simplified Program ROM Circuit. 



8-113. Program ROM. Figure 8-35 shows a simplified sche- 
malic diagram of the program ROM circuitry used in the 
inguard controller. The program RO.M contains the opera- 
tion instructions for the inguard controller routine. There 
are 512 eight bit program storage locations contained in the 
ROM which are addressed by nine input lines (10 through 
18). The ROM output is connected to the processor data 
lines D0 through D7. The output ofjlie ROM is enabled 
only when the signal level applied to 18 is thccomplement 
of the level applied to 18. This function is accomplished by 
gates Lf29C and 1/29D and occurs wlieri (he processor sets 
the "program gate” signal high. 

8-114. Output Circuit. The output circuit of the inguard 
controller controls all inguard switching of the voltmeter. 
Switch control signals are transferred through six latches 
(sec Figure 8-36). Hach latch is set individually to output 
the proper switch signals. The inguard processor sets the 
switching information for the latches on the data bus (pro- 
cessor output D0 through DS) and the select code for the 
particular latch to accept the information on device select 
lines DS0 through DS3. Transfer of information from the 
processor to the latches is synchronized by (he clock input 
to the processor and (he device select decoder U14. 

8-115. MAIN CONTROLLER. 

8116. General. 

8-1 17. The purpose of the main controller is to control 



communication between the front panel. HP-IB interface, 
display and inguard section of the multimeter and to per- 
form mathematical calculations to correct measurement 
data and provide measurement scaling or percent error 
readings. The following is an explanation of the operations 
performed by the main controller as illustrated in Figure 
8-37. 

a. The main controller reads and stores the status code 
of (he front panel switches flocal operation) or HP-IB buf- 
fers (remote operation) to determiflO inOaSUremeiU para- 
meters, such as range, function, mode, and sample time. 

b. Using the status information, the main controller 
generates switching information for the analog section and 
transfers this information to the inguard controller. 

c. During (he time the inguard controller is setting the 
switches and making the required measurements, the main 
controller computes (he constants used to correct the mea- 
surement data. This step is shown in Figure 8-37 as "per- 
form preliminary math calculations" and involves combin- 
ing (he offset error and full scale error readings, relevant to 
the measurement being made, into two constants. 

d. The main controller receives the measurement data 
from the inguard controller, applies the correction factors 
found in the previous step and computes the corrected 
measurement answer. 



8-22 









Model 34SSA 



THEORY OF OPERATION 



Section VUl 



e. The main controller next checks to see if one of the 

math functions have been selected. The math functions pro- 

X - z 

vide either a scaled answer ( y ), where x is the measure- 
ment answer and y and z are values entered by the opera- 

x - y 

tor, or a percent error answer ( — ~ — x 100), where x is 
the measurement answer and y is a^ reference value entered 
by the operator. If the math function has been selected, the 
main controller computes the math answer. 

f. The main controller next checks to see if the HP-IB 
buffers are active (outputting data to the bus). If the HP-IB 
buffers are not active, the main controller loads the answer 



into them. If the buffers are active the controller bypasses 
this step. 

g. The main controller loads the fmal answer in the dis- 
play buffers and returns to the start of the program. 

8-1 18. Circuit Description. 

B-119. ROM Circuit. The main controller uses three 
ROM’s to store the programs necessary to control the var- 
ious functions and operations of the voltmeter. Each ROM 
is capable of storing 2048, eight bit “words” of program 
information and is divided into two “pages” of 1024 words 




8-23 















Section Vill 



THEORY OF OPERATION 



Model 345SA 




RETURN TO START 



each. Five of the six pages contain the programs necessary 
for the normal operation of the voltmeter while the sixth 
page contains a test program to aid in troubleshooting and 
to verify proper operation. This test feature is not program- 
mable from the front panel. The ROM’s are addressed by 
the main processor through the program address bus (pro- 
cessor outputs PA9 through PA9). The program informa- 
tion is sent to the processor through the processor data bus 
(lines D0 through D7). All ROM's receive the address in- 
formation. The particular program information received by 
the processor is determined by the program address code, 
the page select signal, and which ROM is enabled. 

8-120. Figure 8-38 is a schematic of the ROM circuitry. 
During normal operation, the test connector JI is con- 
nected as shown. This connection disables the upper page 
(lest program) or ROM U8 and allows ROM’s U6 and U7 to 
be enabled. Removing the jumper permits only the upper 
page (test program) of U8 to be enabled. Cormecting the 
jumper between ground and the “disable" connection dis- 
ables all ROM outputs to aid in testing the main processor. 

8-121. During normal operation, the ROM's are enabled in 
the following manner. At turn on, only the lower page of 
U8 may be enabled. This is because the normal turn on 
state of address line PAIO is low which allows U8 to be 
enabled and “holds ofT’ the enable circuitry for ROM’s 
U6 and U7. To enable ROM’s U6 or U7, the foUowing 
sequence is used. 

a. The code to select the desired ROM and page is set 
on data lines D0 and Dl. Line D0 is used to select the page 
and is set high for upper pages and low for lower pages. 
Line Dl is used to select the particular ROM and is set high 
to select ROM U6 or low to select U7. 

b. The device select code to select output YS of U3 1 is 
sec on device select lines DS(} through DS3. 

c. Address line PAIO is set high to disable ROM U8 and 
allow ROM’s U6 and U7 to be addressed. 

d. The READ/WRITE line is set high (write). 



The above outputs are synchronized by the clock signal. 
The combination of the output from the device select 
decoder U33 and the WRITE output from the processor 
causes a pulse at the clock input of US and sets the Q 1 and 
Q2 outputs to the levels of data lines D<3 and Dl (page and 
ROM select data). Once US is set the processor data lines 
(D0 through D7) and READ/WRITE line are released for 
other operations. Address line PAIO remains high as long as 
ROM U6 or U7 are to be addressed. The output of the 
ROM and page selected is then enabled when the Program 
Source Cate is set h^h. To return to the lower page of U8 
it is only necessary to set address line PAI0 low. 



Figure 8-37. Simplified Main Controller Flowchart. 



8-24 



8-122. At the beginning of an “interrupt sequence’’ the 
processor enables gates U3A and U3B by activating output 
YS of the device select decoder and setting the READ/ 





Model 3455A 



THEORY OF OPERATION 



Section VllI 





I lacoa« 






iUWnTc 



Figure 8-38. Main Controller ROM Circuit. 



WRITE output low (READ). The outputs of U3A and U3B 
are then sent to the processor through data lines D0 and D1 
and represent the page and ROM that was active at the 
time of interrupt. The ROM and page information along 
with the address code arc stored by the processor so that 
after the interrupt routine it can return to that step in the 
program. 

8-123. RAM Circuit. The RAM’s are used to store temp- 
orary data such as auio-cal constants, display data, front 
panel and HP-IB status codes, math computations and 
references, and control status codes. Figure 8-39 is a sche- 
matic diagram of the main controller RAM circuit. The 
RAM's can be set to a particular address by the main pro- 
cessor or are automatically incremented to the next mem- 
ory address each time data is stored or read. This method 
allows groups of data to be transferred between the RAM's 
and main processor without having to address each step and 
results in higher operating speed. 

8-124. The RAM's are addressed by the main processor in 
the following manner: 

a. The processor sets the desired address code on data 
lines DQ) through D7. sets the proper code on the device 



select lines (DS0 through DS3) to activate output Y4 of 
device select decoder U4I, and sets the Read/Write output 
high (write). 

b. The outputs of the processor and the device select 
decoder are synchronized by the clock signal. 

c. The Rcad/Writc signal enables buffers U34 and U42 
to apply the address code to the inputs of presettable 
counters U36 and U37. 

d. The negative-going pulse from output Y4 of device 
select decoder U41 is applied, thix^ugh gates U38B and 
U3SD, to the "load" inputs of U36 and U37 to load the 
address code into them. The code which has been loaded 
into the presettable counters is then applied to the address 
inputs (lines A0 through A7) of the RAM's (U44 and U4S 
U45). 

8-I2S. Data is stored in the RAM’s as follows: 

a. The processor sets the data to be stored on data lines 
through D7, sets the proper code on device select lines 
DS0 through DS3 to activate output Y1 of device select 
decoder U41, and sets the Read/Write output high (write). 



8-25 










Section Vni 



THEORY OF OPERATION 



Model 3455A 




Figure 8-39. Main Controller RAM Circuit. 



b. The Read/Writc signal enables buffers U34 and L)42 
to apply the data to the RAM's I/O lines and is also applied 
to the R/W input of the RAM's to enable the write ampli- 
fiers. The negative-going pulse from output Y1 of U41 is 
applied to the CE inputs of the RAM’s to enable them to 
store the data. Output Y1 of U4I is also applied to the 
“clock" inputs of U36 and U37 (through U38) to incre- 
ment the address code by one upon completion of the 
“store” operation. 

8-126. The processor “reads” data from the RAM’s as 
follows 

a. The processor sets the code necessary to activate out- 
put YI of U4I on device select lines DS9 through DS3, and 
sets the Read/Write line low (read). 

b. The Read/Write signal is inverted by U4F and applied 
to the RAM's R/W input to enable the output buffers. The 
negative-going pulse from output YI of U4I is applied to 
the CE input of the RAM's to enable their outputs. The 
RAM output data is applied to the inputs of buffers U3S 
and U43 which are enabled by the low output of gate 
U46A. 

c. The data is read by the processor on data lines DQ 
through D7. 

d. As with the “store” sequence, the negative pulse 
from output YI of the device select decoder is applied, 
through gate U38D, to the “clock” input of counters U36 
and U37 to increment them to the next address. 



8-127. ALU Circuit. The Arithmetic Logic Unit (ALU) 
provides added computational capability to the main con- 
troller for computing Auto-Cal constants, measurement 
data corrections, and “scale” and "% error” math func- 
tions. The ALU also provides logic functions which are used 
for certain control operations. The ALU performs Arith- 
metic or Logic operations on two, 22 bit binary numbers in 
eight bit segments starting with the eight least significant 
bits. 

8-128. Figure 8-40 shows a schematic diagram of the ALU 
circuit used. The numbers to be entered into the ALU’s are 
8 bit binary codes and are entered as follows: 

a. The processor sets the numerical data on data lines 
DO through D7, sets the READ/WRITE line high (write), 
and sets the device select lines DSO through DS3 to the 
code necessary to activate the proper output of device 
select decoder U33 (output YI for number “A”, Y2 for 
number “B”). 

b. The outputs of the processor and device select 
decoder arc synchronized by the clock signal. 

c. The READ/WRITH signal enables buffers U34 and 
U42 to apply the binary information from the processors 
data output to the ALU input latches. The information is 
set in latches U29 and U31 (number “A”) or U24 and U25 
(number “B”) by the signal from device select decoder 
U33. 

d. The ALU operation instruction is a 6-bit binary code 



8-26 






Model 3455A 



THEORY OF OPERATION 



Section VIII 




composed of a 4-bi( instruction code, 1 bit of mode infor- 
mation to determine whether the operation is to be an 
arithmetic or logic function, and 1 bit of “carry” informa- 
tion. 

e. The operation instruction is entered into the ALU’s 
in the same manner as the numerical data except, only pro- 
cessor data lines D9 through D5 are used to output the 
data. 

8-129. The output of the ALU’s is read by the processor in 
the following manner; 

a. The processor sets the READ/WRITE line tow 
(READ) to disable buffers U34 and U42 and sets the 
proper code on device select lines DS0 through DS3 to 
activate output Y4 of U33. 

b. Output Y4 of U33 enables the ALU output buffers 
U2 1 and U22 and the data Is read by the processor on data 
lines D0 through D7. In the event that a “carry” occurred 
during the ALU operation, the carry output (CN + 4) of 
U28 is output through gate U16B to set F4 of the proecs- 
for. 

8-130. Interrupt Circuit. The Interrupt Circuit is used to 
signal the main processor when the front panel switch data 
has been changed, when an external trigger has been 
applied, when the HP-IB (Hewlett-Packard Interface Bus) 
needs service, or at “turn-on”. The Interrupt Circuit is also 



used to strobe the front panel display. The Interrupt Cir- 
cuit has been designed so that the Interrupt Signals arc 
assigned priorities. In the event of two or more Simultane- 
ous Interrupt Signals, the one with the highest priority will 
be handled first. The HP-IB Interrupt is assigned the highest 
priority and will be serviced before the external trigger or 
front panel interrupts. The external trigger interrupt is 
assigned the second highest priority and will be serviced 
before the front panel interrupt. All three interrupt signals 
have priority over the display strobe signal. The turn-on 
interrupt occurs only at initial turn-on of the voltmeter. 
Figure 8-41 is a simplified schematic of the Main Controller 
Interrupt Circuit. 

8-131. HP-18 Interrupt. When the HP-IB requires service, 
it sets the HP-IB Interrupt signal high. This signal is applied 
to the input of US3B. The output of U53B is applied to 
U47B to disable the front panel interrupt circuit and 
through US2A to the interrupt gates which set the proces- 
sors interrupt input. The HP-IB interrupt input is also 
applied to U46D to set the interrupt address. Upon recog- 
nizing the interrupt input, the processor sets the interrupt 
enable low, to remove the interrupt input, and sets the 
interrupt acknowledge high, to enable address gates U47D 
and U46D. The address gales set the interrupt address on 
the processors data bus. It is possible for both the external 
trigger interrupt and the HP-IB interrupt to occur simultan- 
eously and set their respective interrupt address code on the 
processor data bus. When this occurs, the processor is pro- 
grammed to vector to the HP-IB Interrupt address to main- 



8-27 








Section VUl 



THEORY OF OPERATION 



Model 3455A 




tain priorities. After accepting the interrupt address, the 
processor sets the interrupt acknowledge line low to disable 
address gates U46B and U46D. The processor then services 
the HP-IB to dear the intenupt input. 

8-132. External Trigger Interrupt. Operation of the Exter- 
nal Trigger Interrupt is the same as the HP-IB Interrupt 
with the exception of the interrupt address gate activated. 
During External Trigger Interrupt, address gate U44B is 
used to set the interrupt address on the processor’s data 
bus. 

4-133. Front Panel Interrupt. When the status of the front 
panel switches is changed, the switch status interrupt signal 
is set high. This removes the “dear" signals from U40A and 
U40B and triggers the monostable multivibrator U48A. The 
output of the multivibrator is a negative pulse approxi- 
mately 6 milliseconds in duration. This negative signal is 
applied to interrupt gates US5B and USSC to disable the 
interrupt input to the main processor. This insures that the 
processor is not Interrupted by the other interrupt signals 
while the front panel is being serviced. The negative output 
of U48A is_also applied t^the “preset” input of U40B to 
set output Q low. Output Q of U40B is applied to U47D to 
disable the interrupt address gates and through U39B to set 
the inputs of U47A and USSC high. 

8-134. As the output of multivibrator U46A returns high, 
the following occurs; 

a. The front panel output latch is set to the new switch 
status code. 



b. The positive-going _^al is applied to the “dock” 
input of U40A to set the Q output low. This signal, applied 
through U47B and U39C, disables the input of U48A to 
prevent premature retri^ering. 

c. Interrupt gate USSC is enabled to set the main pro- 
cessor interrupt input. 

8-13S. Upon recognizing the interrupt signal, the main pro- 
cessor sets the interrupt enable output low to remove the 
interrupt signal and sets the interrupt acknowledge signal 
high. The interrupt acknowledge signal enables gale U47A 
which enables the front panel output buffers allowing them 
to set the new switch status code on the processor's data 
bus(D0 through D7). 

8-136. Upon accepting the switch status information, the 
processor sets the interrupt acknowledge signal low. This 
signal is applied to U47A to disable the front panel output 
buffers ^nd through U39A to the clock input of U40B to 
set the Q output high. This removes the disable from U47D 
and applies a disable signal to USSC and U47A. 

8-137. When the front panel switch is released, the front 
panel interrupt signal is set low. This resets the trigger 
enable input of U48A and sets the “clear” inputs of U40A 
and U40B to return the circuit to its “ready" state. 

8-138. Display Strobe Circuit. When no interrupts are pre- 
sent, the interrupt circuit is used in the display function of 
the voltmeter. Monostable multivibrator U48B is triggered 



8-28 






Model 3455A 



THEORY OF OPERATION 



Section VIII 




Figure 8-42. Simplified Turn-on Interrupt Circuit. 



by output Y2 of device select decoder U41 . The output of 
U48B is a negative pulse approximately 1 millisecond in 
duration and is applied to the strobe inputs of the display 
driver decoder to enable it. As the output of U48B returns 
high, gate US3B is enabled. The low output of US3B is 
applied through US2A to the interrupt gates to set the pro- 
cessor’s interrupt input of the processor. Upon noting the 
interrupt, the processor sets the interrupt enable signal low 
to remove the interrupt input and sets the interrupt 
acknowledge high to enable the interrupt gates. The pro- 
cessor then checks the data bus (D0 through D7) for the 
interrupt address. In this case all data inputs are high which 
the processor recognizes as the display function interrupt 
address. 

8-139. Turn-On Interrupt. The purpose of the “tum-on” 
interrupt is to start the main processor at a known program 
address when power is initially applied to the voltmeter. 
Figure 8-42 shows a simplified schematic of the turn-on 
interrupt circuit. At tum-on, a negative-going pulse is 
applied to the “preset” input of latch U26B from the RC 
network composed_of R3 1 and C19. This sets the “Q” out- 
put high and the “Q” output low. The Q output is applied 
Co U47C which sets the intermpt input to the processor. 
The Q output is applied through inverter US to the pro- 
cessor data bus (D2 through 07) to set the starting address. 

8-140. Upon recognizing the interrupt signal, the processor 
reads the start address from the data bus and sets the inter- 
rupt acknowledge output low. The interrupt acknowledge 
signal is applied through inverter U39A Co the “dock^ 
input of U26B. This sets the Q output low and the Q 
output high, disabling the turn-on interrupt circuit. 

8-141. HP-iB CIRCUIT. 

8-142. General. 



the integration of instruments, calculators, and computers 
into systems. The HP-IB employs a 16-line Bus to inter- 
connect up to IS instruments. Normally, this Bus is the sole 
communication link between the interconnected units. 
Each instrument on the Bus is connected in parallel to the 
16 Bus lines. Eight of the lines are used to transmit data 
while the remaining eight lines are used for communication 
timing (Handshake) and control. Data is transmitted on 
the eight data lines as a series of eight-bit characters 
(“bytes"). Normally, a seven-bit ASCII code is used with 
the eiglith bit available for a parity check. Data is trans- 
ferred by means of an interlocked “handshake” technique 
which permits asynchronous communication over a wide 
range of data rates. Figure 8-43 illustrates the HP-IB inter- 
face connections and overall Bus structure. Bus communica- 
tion is controlled by the five general interface management 
(control) lines. These lines determine how information will 
be interpreted by devices on the Bus. The data bus (lines 
DIOl through D108) is used to transfer information be- 
tween devices on the Bus. The three data byte transfer 
control (handshake) lines permit synchronization of the 
data transfer on the data bus. 

8-144. Circuit Description. 

8-145. Initial Turn-On. (Refer to the HP-IB Schematic for 
the following descriptions.) The interface circuit is initial- 
ized by the main controller at "turn-on”. After completion 
of the tum-on sequence and before the Bus is active the 
following conditions exist : 

a. The outputs of latches U1 1, U19, U20, and U26A are 
low. 

b. Signal inputs to buffers UlS, UI6, U17 and U18 are 
low. 

c. Inputs to interrupt gates U7A and U7C are low caus- 
ing the interrupt output (U2A pin 3) to be low (false). 



8-143. The Hewlett-Packard Interface Bus (HP-IB) is a d. All driver inputs and receiver outputs of Bus Trans- 

carefully defined instrumentation interface which simplifies ceivers U6, U9 and U12 arc low. 



8-29 





Section VllI 



THEORY OF OPERATION 



Model 3455A 




NOTE 

It is possible for the interface circuit to momen- 
tariiy drive the Bus lines low (true) before the 
tum-on sequence has been completed. 

8-146. Circuit Response to Bus Commands. The following 
description explains the Voltmeter interface circuit re- 
sponse to command statements received from the HP-IB 
(Hewlett-Packard Interface Bus). This description is divided 
into five parts as follows: 

a. Acceptance of the command data. 

b. Voltmeter execution of the command. 

c. Completion of the ‘'handshake" sequence. 

d. Receive Data. 

e. Output Data. 

8-147. Acceptance of the Command Data. The follow- 
ing describes the sequence performed by the Voltmeter 
interface circuit to accept command data. This sequence 
applies to all command statements received from the 
HP-IB. 

8-148. The controller in charge of the HP-IB sets the code 
of the command data to be transferred on data lines DIO I 
through DIOS and sets the ATN (Attention) line low (true). 



The ATN signal is input to the Voltmeter interface circuit 
through inverter U3E and is applied to the input ofbuffer 
UlSA and inverter U3B. The low output of USB disables 
qualifier gates U2D, UI4B, U14D and UI3D and is applied 
to U2C to set its output high. The high output of U2C sets 
the enable inputs of UlSA and U13B. The high output of 
U13B is applied to the driver B input of transceiver U9 to 
set the NDAC output low (true). This indicates to the 
HP-IB controller that the Voltmeter is ready to accept data. 

8- 149. After allowing time for the data on the DIO lines to 
“settle", the HP-IB controller sets the DAV (data valid) line 
low (true). The DAV signal is input to the interface circuit 
through transceiver U9 and is applied to the signal input of 
qualifier gate UlSA. The high oulputofUlSA is coupled 
through gate U2B and inverter UlOD to the inputs of 
buffer UlSD and interrupt gate U7C. The low (true) output 
of U7C is applied to the input of U2A to set the interrupt 
signal to the main processor. 

8-ISO. Upon recognizing the interrupt signal, the main pro- 
cessor enables buffers UlS and UI6 to read the status 
word. In this case, bit 3 is set, indicating valid data is on the 
bus, bit 5 must be set to enable the voltmeter to go to 
remote operation, and bit 6 is set to indicate the message is 
a command statement. The main processor enables buffers 
U17 and UI8 to read the data byte. 



8-151. After reading the data byte, the processor sets the 
“nrfd" output (IQ) of latch Ull high (true). The nrfd 



8-30 





Model 34S5A 



THEORY OF OPERATION 



Section VIII 



signal is applied to the enable input of qualifter gate UI3C 
and the driver A input of bus transceiver U9. Transceiver 
U9 drives the NRFD bus line low (true), indicating the 
Voltmeter has accepted the data. The processor next sets 
the “ndac” output (6Q) of latch Dll high (false). The ndac 
signal is applied through inverter U lOA to the enable input 
of U2B and the signal input of U13B. The low output of 
U13B is applied to the driver B input of transceiver U9 to 
disable it and allow the NDAC Bus line to go high (false). 

8*152. Execution of Command Instructions. After the 
command data has been accepted, as previously described, 
the main processor deciphers the data to determine the 
nature of the command. This section describes the interface 
circuit response to the following Bus commands: 

a. “Listen” Command 

b. “Unlisten” Command 

c. “Talk” Command 

d. “Untalk” Command 

8-153. Listen CommarxJ. When the processor receives a 
listen address from the HP-IB it enables inverter U1 and 
reads the address code the Voltmeter has been set to. This 
code is determined by the settings of switch SI. The pro- 
cessor compares this code with the one received to deter- 
mine if it has received its listen address. Upon recognizing 
the listen address of the Voltmeter, the processor sets the 
output (pin 10) of U70 low to turn A2CR2 (listen enunci- 
ator) on (see Front Panel Assembly Schematic). The pro- 
cessor next sets the “mla” output (4Q) of U1 1 high (true). 
The mla signal is applied, through inverter USD. to the 
input of qualifier gate U2C to maintain its output high. At 
this point the Voltmeter has been addressed to listen and 
enabled to receive data messages. 

8-154. Unlisten Command. Upon recognizing the “un- 
listen” command, the processor sets the output (pin 10) of 
latch U70 high to turn A2CR2 (listen enunciator) off (see 
Front Panel Assembly Schematic). The processor next sets 
the “mla" output (^) of latch U1 1 low (false) to return 
the interface circuit to the “turn-on” state. 

8-155. Talk Command. When the processor receives a 
“talk” address from the HP-lB it enables inverter U1 and 
reads the address code the Voltmeter has been set to. This 
code is determined by the settings of address switch SI. 
The processor compares this code with the one received 
from the HP-IB to determine if it has received its talk 
address. Upon recognizing the talk address of the Volt- 
meter. the processor sets the output (pin 7) of latch U70 
low to turn A2CR3 (talk enuncaitor) on (see Front Panel 
Assembly Schematic). The processor next sets the "dav 
req” output (SQ) of latch Ull high (true). This signal is 
applied to the enable input of qualifier gate U14C. At this 
point the Voltmeter has been addressed to “talk” and is 
awaiting the removal of the ATN signal by the HP-IB 
controller before outputting measurement data. 

8-156. Untalk Command. Upon recognizing the “untalk” 
command, the processor sets the output (pin 7) of latch 



U70 high to turn the “talk" enunciator (A2CR3) off (see 
Front Panel Assembly Schematic). The processor next sets 
the “dav req "output (5Q) of latch U 1 1 low (false) to return 
the interface circuit to the “turn-on" state. 

8-157. Handshake Completion. After all instruments on 
the HP-IB have accepted the command data (the NDAC Bus 
line has gone high) the HP-IB controller sets DAV high 
(data is no longer valid). This sets the receiver D output of 
transceiver U9 low. The low output of U9 is applied to the 
input of U13A and through inverter UlOC to the input of 
qualifier gate UI3C causing its output to go high. The out- 
put of U13C is applied to the signal input of buffer UI5C 
and to the input of interrupt gate U7A. The low output of 
U7A is applied to the input of gate U2A to set the interrupt 
signal to the processor. 

8-IS8. Upon recognizing the interrupt signal, the processor 
envies buffers UlS and UI6and reads the interrupt code. 
In this case bit 4 is set, indicating the completion of a data 
byte. The processor determines the nature of the interrupt 
and sets the “ndac” output (6Q) of latch U1 1 low (true). 
The low output of Ul 1 is applied through inverter UlOA to 
the inputs of U2B andUI3B. If the ATN signal or the mla 
signal is true the output of U13B will be set high. The high 
output of U13B is applied to the driver B input of trans- 
ceiver U9 to set the NDAC line low (true). The processor 
next sets the “nrfd” output (IQ) of Ul 1 low (false). The 
low output of Ul 1 is applied to the driver A input of U9 
to set the NRFD output high (false) and to the input of 
U13C to disable it and remove the interrupt signal. This 
completes the sequence for accepting and executing com- 
mand statements. 

8-159. Receive Data. Data received from the HP-IB Is used 
to remotely program the Voltmeter’s front panel controls 
(range, function, math, etc.). The Voltmeter must have pre- 
viously been addressed to “listen” and set to remote con- 
trol before it will respond to program data messages. 

8-160. The following paragraphs describe the interface cir- 
cuit response to program data messages. The HP-IB control- 
ler sets the program information on Bus lines DIOl through 
D108. After allowing lime for the information to “settle", 
the controller sets DAV (data valid) low (true). The DAV 
signal sets the receiver D output of transceiver U9 high 
(true). The high output of U9 is applied through inverter 
UlOC to the input of qualifier gate UI3C to disable it and 
to the input of U13A. The output of UI3A is coupled 
through gate U2B and inverter UIOD and applied to the 
input of buffer U15D and interrupt gate U7C. The low out- 
put of U7C is applied to the input of gate U2A to set the 
interrupt output to the main processor. 

8-161. Upon recognizing the interrupt signal, the processor 
enables buffers UlS and U16 and reads the status word. 
After determining the nature of the interrupt, the processor 
enables buffers U17 and UlS and reads the program data. 
If the processor has read the first byte of program data 
(two bytes are required for each program step) it sets a flag 



8-31 




Section VIII 



THEORY OF OPERATION 



Model 3455A 



and retains the first data byte information. If the processor 
has read the second byte of information it stores the com- 
posite of the first and second bytes and sets the appropriate 
output of enundator latches U6S through U70 low (true) 
to light the enundator pertaining to the program informa- 
tion. The processor next sets the nrfd output (IQ of latch 
U1 1 high (true). The output of Ul I is applied to the enable 
input of qualifier gate U13C and to the driver A input ol 
transceiver U9 which sets the NRFD bus line low (true). 
The processor next sets the ndac output (6Q) of latch Ul 1 
high (false). This signal is applied through inverter UlOA 
to the input of qualifier gate U2B to disable it and remove 
the interrupt signal to the processor. The ndac signal is also 
applied to the input of gate U13B. The low output of U13B 
is applied to the driver B input of transceiver U9 which 
stops driving the NDAC bus line (allows it to go high). This 
indicates to the HP-IB controller that the Voltmeter has 
accepted the data and is ready for more data. 

8- 162. Sensing that the Voltmeter has accepted the data, 
the HP-IB controller sets the DAV line high (data on the 
DIO lines is no longer valid) and prepares to output the 
next data byte. The DAV high signal sets the receiver D 
output of transceiver U9 low. The low output of U8 is 
applied to the input of gate U ISA to disable it and through 
inverter UlOC to the input of gate U13C. The high output 
of U13C is applied to the signal input of buffer UI5C and 
to the input of interrupt gate U7A. The low output of U7 A 
is applied to the input of gate U2A to set the interrupt out- 
put to the processor. The processor recognizes the interrupt 
signal and enables buffers UIS and U16 to read the bus 
status word. 

8-163. Upon determining the nature of the interrupt, the 
processor sets the ndac output (6Q) of latch Ull low 
(true). The output of Ul 1 is applied through inverter UlOA 
to the input of qualifier gate U2B and to the input of gate 
UI3B. The high output of U13B is applied to the Driver B 
input of transceiver U9 which sets the NDAC Bus line low 
(true). The processor then sets the nrfd output (IQ) of 
Ull low (false). This signal is applied to the driver A input 
of U9, which sets the NRFD bus line high (false), and to 
the input of qualifier gate UI3C to remove the interrupt 
signal. This completes the sequence for accepting one byte 
of program data. 

8-164. Output Data. The following paragraphs describe 
the sequence followed by the interface circuit to output 
measurement data to the HP-IB. The voltmeter must have 
previously been addressed to “talk" and the HP-IB must 
NOT be in the command mode before the voltmeter can 
output measurement data. 

8-165. When the Voltmeter is addressed to talk the “dav 
rcq” output (5Q) of latch Ull is set high (true). As the 
HP-IB exits the command mode (the ATN signal is re- 
moved) and ail bus instruments are ready to accept data 
(NRFD is high) the output of qualifier gate U14C is set 
low. The output of UI4C is applied to the input ofbuffer 
U16C and the input of interrupt gate U7C. The low output 



of U7C is applied to the input of U2A which sets the inter- 
rupt output to the processor. 

8-166. Upon recognizing the interrupt signal, the processor 
enables buffers UIS and UI6 to read the status word. After 
determining the nature of the interrupt the processor sets 
latches U20 and UI9 to the code of the first byte of mea- 
airement data. The outputs of UI9 and U20 are applied to 
the driver inputs of transceivers U6 and U12. The processor 
next enables transceivers U6 and UI2 to output the mea- 
surement data to the HP-IB data bus (DIO I through DI07). 
After the measurement data has had time to “settle”, the 
processor sets the “dav” output (2Q) of latch Ull high 
(true). The dav signal is applied to the input of qualifier 
gate U14A and gate U13D. The high output of UI3D is 
applied to the driver D input of transceiver U9 which sets 
the DAV Bus line low (true). The processor then sets the 
dav req output (SQ) of latch Ul 1 low (false). This signal is 
applied to the input of qualifier gate U14C to disable it and 
remove the interrupt signal. When the measurement data 
byte has been accepted by the receiving instrument(s) the 
NRFD line is set low and the NDAC line is high. The NDAC 
signal sets the Receiver B output of transceiver U9 iow. 
This output is applied to the input of qualifier gate UI4B. 
The high output of U14B is applied to the input of gate 
UI4A to enable it. The low output of U14A is applied to 
the signal input of UI6D and to the input of interrupt gale 
U7C. The low output of U7C is applied to the input of 
U2A to set the interrupt output to the processor. 

8-167. Upon recognizing the interrupt, the processor 
enables buffers U16 and U15 and reads the status word. 
After determining the nature of the interrupt, the processor 
sets the dav req output (5Q) of latch U! 1 high. The proces- 
sor then sets the dav output (2Q) of UlO iow (false). This 
signal is applied to the input of gate U13D to remove the 
DAV signal from the Bus and to the input of qualifier gate 
UI4A to remove the interrupt signal. This completes the 
output of one data byte. The sequence is repeated until 
each byte of measurement data has been output. 

8-168. FRONT PANEL OPERATION. 

8-169. Circuit Description. 

8-170. Control Switches and Ennunciatort. Refer to the 
Front Panel Assembly Schematic for the following descrip- 
tion. Pressing a front panel key sets one of the input lines 
to priority encoder U57 low. The output of the encoder is 
the octal equivalent of the input line selected that is, the 
output when line “17” is set low is 111, when line “12” is 
low the output is 010, etc. The encoder also sets the gate 
output (pin 14) low to initiate the processor interrupt cir- 
cuit. The outputs of U57 combined with the outputs of 
gate USOA and inverter U49A are applied to the inputs of 
latch US8. The inputs to US8 make up a code which repre- 
sents the key pressed. The interrupt circuit, after a time 
delay of approximately 6 ms, sets the clock input (pin 9) 



8-32 




Model 34SSA 



THEORY OF OPERATION 



Section Vlll 



of US8 high to latch the switch code and also sets the inter- 
rupt input to the main processor. 

8-171 . Upon recognizing the interrupt input, the processor 
sets the interrupt enable output high to enable buffers U59 
and U60 and reads the switch code. This code represents a 
vector address to the processor. The processor performs the 
program routine contained at the address indicated which 
includes transferring the new switch data to the inguard 
controller and outputting data to the front panel to change 
the necessary cnunciators. 

8-172. The new enunciator data is output to the data bus 
(lines D0 through D7) by the main processor and applied to 
the inputs of latches U6S through U70. The new enunciator 
code is contained on lines 00 through 05. Lines 06 and 07 
are applied to the select inputs of decoder U64 and arc used 
to determine which output of U64 will be set low. Outputs 
1Y0 through 1Y3 are enabled by the signal from device 
select decoder U41. Outputs 2Y0 and 2Y1 are enabled by 



8-173. Display. Measurement data is transferred to the 
display one number at a time. The polarity or numerical 
data is applied to the input of latch US4 and the digit (or 
position in the display) and decimal information is applied 
to the input of latch U63. The output of device select 
decoder U41 is applied to the clock input of US4 and U63 
to latch the information. The position information is ap- 

device select decoder U33. The outputs of U64 are acti- 
vated by the delayed clock signal from U52F and applied 
to the clock inputs of latches U6S through U70. All 
outputs of U64 are high except the one driving the latch 
which is to accept the data. The enunciators are lit when 
the output of the latch driving them is set low. 

plied to the select and data inputs of US6 to determine the 
proper display driver to be activated. The outputs of U.56 
are applied to the display drivers (Q1 1 throu^ Q18) and 
are enabled by- the signal from U48B (interrupt circuitry). 
The display is scanned from left to right one number at a 
time. 



8-33/8-34 




Model 34SSA 



Section VIII 



TROUBLESHOOTING 



B-174. INTRODUCTION. 

8-175. The following ponions of this manual contain 
information to aid in troubleshooting and repair of the 
34S5A. This information consists of a General Block 
Diagram Theory of Operation, a Preliminary Trouble- 
shooting Check, and eight Service Croups. An instru- 
ment block diagram and schematics are also included in 
this section of the manual. 

8-176. Ganaral Bloch Diagram Theory of Operation. 

8-177. Read this subsection if you wish to become 
familiar with the internal operation of the 34S5A. Refer 
to the simplified block diagram (Figure 8-44) for the 
following discussion. 

8-178. To understand the basic operation of the 345SA, 
the instrument can be divided into two sections. These 
sections of the Outguard Section and the Inguard Sec- 
tion. 

B-179. Outguard Section. 

8-180. The Outguard Section consists of most logic cir- 
cuits and their power supplies. These circuits function as 
the internal main controller, HP-IB interfacing, and 
front panel interface of the instrument. 



8-181. The main controller circuits are used to control 
communication between the front panel. HP-IB inter- 
face, and the Inguard Section. The controller also per- 
forms mathematical calculations to correct measure- 
ment data, and to provide instrument scaling or percent 
error readings. 

8-182. The heart of the main controller circuits is a pro- 
cessor (referred to as the nanoprocessor) used in con- 
junction with the main controller ROMs. The processor 
and ROMs are located on the A3 board. The ALUs are 
used for calculations and are located on the A1 mother- 
board. 

8-183. The front panel is used for the manual operation 
of the instrument and to display readings. By pressing a 
pushbutton on the front panel, the controller receives a 
message to do the operation requested by the operator 
(DC, AC, etc.). The main controller then sends a 
message to the inguard controller to do the operation. 
After the operation is completed, the inguard controller 
then sends information back to the main controller. The 
information is then converted and displayed on the 
front panel. 

8-184. The HP-IB circuits are used to communicate bet- 
ween the HP-IB and the instruments main controller. 
Information can pass either from the HP-IB to the main 




5r«EiK~ 



Figure B-44. Simplified Block Diagram. 



8-35 














Section VHI 



TROUBLESHOOTING 



Model 34S5A 



controller or from the main controller to the HP-IB. Ex- 
ample: the main controller receives a message from the 
Bus to read DC. After a reading is taken, the main con- 
troller sends the reading to the Bus. It should be noted, 
as with the front panel, the bus circuitry can interrupt 
the main controller whenever necessary (to clear inter- 
face, etc.). 

B-185. Inguard Section. 

8-186. The Inguard Section consists of (he measuring 
circuitry, a controller, and power supplies. The main 
function of these circuits is to perform Auto-Cal, DC, 
AC, and Ohms measurements. These circuits arc con- 
trolled by an inguard controller, which in turn are par- 
tially controlled by the outguard controller. 

8-187. The circuits used for Auto-Cal and DC 
measurements are basically the same. The Auto-Cal 
measurements consists mostly of gain and offset 
measurements of various op-amps and FETs. The Auto- 
Cal function can be turned on or off, as desired by the 
operator. 

8-188. The following procedure outlines a typical DC 
measurement. 

a. A DC signal is applied to the input of the 3455A. 
This signal may or may not be attenuated by the input 
attenuator circuits. 

b. The signal is next applied to the Main Amplifier 
through the Auto-Cal and Measurement Switching cir- 
cuits. After pre-amplifications by the Main Amplifier, 
the signal is applied to the A/D convertor (10 V DC for 
full scale). 

c. The A/D convertor changes the analog signal to a 
digital signal and sends the digital signal to the inguard 
controller. The inguard controller (hen transfers this in- 
formation to the outguard controller. 

d. The outguard controller processes the information 
and displays the reading on the front panel. 

8-189. Auto-Cal measurements are taken in the form of 
Auto-Cal constants and are used to compensate for in- 
ternal measurement errors. To help generate the cal con- 
stants (gain and offset), stable reference voltages (± 
10 V) and stable resistive divider (1 kO, 100 kR, 900 kR, 
and 1 MR) are used. These circuits are located on the 
reference module. The reference voltages are also used 
for the operation of the A/D convertor. 

8-190. The ohms convertor is used to supply the current 
for an ohms measurement and in turn causes a voltage 
drop across the unknown resistor. The voltage drop 
depends on the value of the unknown resistor and the 
range of (he instrument. This voltage is measured along 
with a voltage drop across a reference resistor, by the 
DC circuits of the 3455A. The DC readings are then 



converted to digital readings and passed on to the main 
controller. The reading is then calculated by the main 
controller to an ohms reading to be displayed on (he 
front panel. 

8-191 . The 3455A offers a choice of either a True RMS 
or an Average Responding AC Convertor. Both conver- 
tors changes an AC voltage to a DC voltage with an 
amplitude of approximately 6.7 V for a full scale in- 
put. This resultant DC voltage is (hen processed by the 
DC circuits, as explained in paragraph 8-188, with the 
exception of the DC attentuator circuits. The attenua- 
tion is done on the AC convertor board. The main con- 
troller receives the digital information from the inguard 
controller and is then processed to be displayed as an 
AC reading on the front panel. The following is an ex- 
planation of the differences between the convertors. 

a. True RMS Convertor; The True RMS Convertor 
can cither be AC or DC coupled. Using operational cir- 
cuitry, the input voltage to (he convertor is changed to a 
DC level proportional to the RMS value of the input 
voltage. 

b. Average Responding Convertor: The Average 
Responding Convertor is only AC coupled. An average 
responding circuit calibrated to the RMS value of a 
sinasoidal input voltage, is used in this convertor. The 
resultant DC output of the convertor is a voltage pro- 
portional to the average value of the input voltages ab- 
solute value. 



8-192. The inguard controller controls the operation of 
the inguard section after receiving instructions from the 
outguard controller. The inguard circuits being control- 
led are used to perform the various measurements. 

8-193. For a more detailed explanation of the 34SSA’s 
circuitry, refer to the Theory of Operation Section in 
this manual (paragraph 8-10). 

8 194. PRELIMINARY TROUBLESHOOTING CHECK. 

8 195. INSTRUMENT HALF SPLITTING TECHNIQUES. 

8-196. Before proceeding to a particular service group 
for troubleshooting the 34S5A should be half-split. This 
is done to determine if the failure is in the inguard or 
outguard section of the instrument. The following pro- 
cedure can be used. 

a. Haif-splitting can easily be accomplished with an 
Inguard/Outguard Service Cable (part number 
03455-61609) and a working 3455A (a second in- 
strument) as follows: 

I. With each 34S5A turned off, disconnect the 
AlOWl Inguard/Outguard cable assembly from 
the outguard connector (A1J7) on each 3455A. 



8-36 




Model 3455A 



TROUBLESHOOTING 



Section VIII 



2. Plug the Inguard/Outguard Service Cable 
from one instrument’s outguard connector (A1J7) 
to the other instrument's Inguard/Outguard cable 
assembly (Wl). The instruments are now effec- 
tively half-split with one unit’s inguard section 
connected to the other unit’s outguard section (see 
(Figure 8-45) 

3. Turn on the instrument with the active in- 
guard section and then turn on the instrument 
with the active outguard section. The display from 
the unit with the active outguard should become 
energized. If the instrument malfunction has 
disappeared, then the portion of the defective in- 
strument used (inguard or outguard) is working. 
Consequently, if the malfunction remains, the sec- 
tion of the defective instrument used is in- 
operative. 

4. The defective section can be verified by 
reversing the Inguard/Outguard Service Cable 



and repeating steps 2 and 3. Make sure the 
3455A’s are turned off, when switching connec- 
tions. Reversing the service cable should verify the 
defective section of the inoperative 34SSA and 
also the working section. 

NOTE 



Make sure the power supplies of the in- 
operative 34S5A are good. 

b. Once it has been determined in what section the 
defective is located (Inguard or Outguard), the correct 
Service Group can be used for component isolation (see 
Paragraph 8-198 for a summary of the Service Groups). 

8-197. If an extra 34SSA or an Inguard/Outguard Ser- 
vice Cable is not available, use the method described in 
Service Group H, Figure 8-H-2. This method is not as 
complete as the half-split technique. 




Figure B-4S. Inguard-Outguard Connections. 



8-198. Service Group Summarv. 

8-199. The following is a summary of the various ser- 
vice groupsand should be used in conjunction with 
Table 8-3. 

a. Turn-On Circuitry (Service Group A): Turn-on 



failures show up as an inoperative front panel "and” a 
blank display, at turn on. Use this service group if both 
of these symptoms are observed. The turn-on circuitry is 
working properly, if there is any indication on the 
display and the front panel is operative. 

b. Auto-Cal and DC Troubleshooting (Service 



8-37 





Section VIII 



TROUBLESHOOTING 



Model 34S5A 



Tfbl« 8-3. Service Creep Listing. 



Ser- 

vice 

Group 


Service Group Description 


Location 


Assembly 


Schematic 


A 


Turn-On Failures (Inguard. Outguard) 


Paragraph 8-A-1 


A1, AID 






Inguard/Outguard Isolation 
Outguard Troubleshooting 


Paragraph 8-A-3 
Paragraph 8-A-5 


A1 A10 
A1, A3 


a 




lr>guard Troubleshooting 


Paragraph 8-A-6 


AID, A14 


6.7 




A10 Board Troubleshooting 


Paragraph 8-A-8 


A10 


5. 6. 7 




A/0 Board Troubleshooting 


Paragraph 8-A10 


A10, A14 


6. 6 




Inguard/Outguard Transfer Troubleshooting 


Paragraph 8-A-1 2 


A1, A10 


7.8 


B 


Auto-Cal and DC Troubleshooting (Inguard) 


Paragraph 8-B-1 


A10 






Auto-Cal Constants 
DC Inoperative 


Paragraph 8-B-3 
Paragraph 8-B-1 7 


AID 

A10 


1 




General Noise 
DC Noise 


Paragraph 8-B-30 
Paragraph 8-B-32 


A10 

AtO 


1 


C 


AC Convertor Troubleshooting 
True RMS Convertor Servicing 


Paragraph 8-C-1 
Paragraph 8-C-3 


A15 


3 




AC Noise 


Paragraph 8-C-12 


A15 


3 




Miscellaneous Troubleshooting 


Paragraph 8-C-16 


A16 


3 




Average Responding AC Convertor 


Paragraph 8-C-1 7 


A13 


2 


0 


Ohms Troubleshooting 


Paragraph 8-D-1 


AID. A12 


1,4 




Ohms Noise 


Paragraph 8-D-1 1 


A10, A12 


1, 4 


E 


A/D Convertor and Inguard Logic Troubleshooting 


Paragraph 8-E-1 


AID, A14 






A/D Convertor Servicirig 


Paragraph 8-E-2 


A10, A14 


6. 7 




A/D Noise 


Paragraph 8-E-8 


A14 


6 




Inguard Logic Troubleshooting 


Paragraph 8-E-10 


A10 


7 


F 


Outguard Logic Troubleshooting 


Paragraph 8-F-1 


A1, A3 


8. 9. 10 




Main Controller Troubleshooting 


Paragraph 8-F-3 


A1. A3 


8 




Front Panel Troubleshooting 


Paragraph 8-F-4 


At. A2 


10 




HP-IB Troubleshooting 


Paragraph 8-F-8 


A1 


9 


G 


Miscellaneous Troubleshooting 
Power Supplies 


Paragraph 8-G-1 
Paragraph 8-G-2 


A10 


1 1 




Reference Assembly 


Paragraph 8-G-3 


A11, A20 


5 




Turn-Over Errors 


Paragraph 8-G-4 


A10. A14 


1, 5. 6 




Other Troubleshooting 


Paragraph 8-G-6 


A1. A3. A10 


6, 11 


H 


Troubleshooting Diagrams 
General Troubleshooting Diagram 
Inguard Troubleshooting Diagrams 
Outguard Troubleshooting Diagrams 
Schematics 


Paragraph 8-I-I-1 
Paragraph 8-H-3 
Paragraph 8-H-4 
Paragraph 8-H-6 
Figure 8-H-28 


A1. A10 
A10 
A1 
All 


1 to 11 



Group B): Use this service group if an OL (overload) 
condition is observed at turn-on, or the instrument fails 
its self-test (see paragraph 3-6), or the dc mode is in- 
operative. A selMest failure is indicated if an integer 
number or non integer number is displayed, when the 
34S5A is in the self-test mode. A display of an integer 
number indicates an Auto-Cal failure and if only a non 
integer number is displayed, the failure is in the logic 
circuits. Use the half-split technique to isolate the in- 
guard and outguard logic sections and go to Service 
Group E for the inguard logic troubleshooting and Ser- 
vice Croup F for the outguard logic troubleshooting. 

c. AC Convertor Troubleshooting (Service Croup 
C): Use this service group if the ac function is defective. 
Before using this service group, however, the instrument 



should operate correctly in the dc function and Auto- 
Cal mode. 

d. Ohms Troubleshooting (Service Group D): Use 
this service group if the ohms function is defective. 
Before using this service group, the dc function and the 
Auto-Cal mode of the 34SSA should operate correctly. 

e. A/D Convertor and Inguard Logic Trouble- 
shooting (Service Group E): This service group can be 
used when it has been determined by the half-split 
technique that the inguard section of the instrument is 
defective. A faulty A/D Convertor or a faulty inguard 
can also be determined by an indication of strange 
readings on all functions and ranges. This service group 
can also be used if a defective A/D board has been 



8-38 









































Model 34S5A 



TROUBLESHOOTING 



Section VIII 



isolated by substituting it with a good A/D board. 

f. Outguard Logic Troubleshooting (Service Group 

F) : This service group should be used if a defective 
outguard section has been isolated by the half-split 
technique. Helpful hints for the Signature Analysis (SA) 
method are mainly given in this group. 

g. Miscellaneous Troubleshooting (Service Group 

G) : This service group can be used for troubleshooting 



power supplies, reference assembly, turn-over errors, 
and others. The troubleshooting information in this 
group does not fit in the other groups. 

h. Troubleshooting Diagrams (Service Croup 

H): Troubleshooting Diagrams may be used to service 
the 3455A in place of the other service groups. This 
group also contains a detailed block diagram and all the 
schematics of the circuits used in the instrument. 



8-39 




Section VUI 



Model 345SA 



SERVICE GROUP A 

B-A-1. TURN ON CIRCUITRY (IN6UAR0 AND OUTGUARD). 

8'A-2. Turn-On failures will show up as an inoperative front panel and a blank display. Because of 
the RAM's timing, the LED's which first light up will vary with instruments and also on the same 
34SSA each time it is powered up. Therefore the front panel will usually give no clues to the reason 
for any turn-on failures. 

B-A-3. Inguard/Qutguard Isolation. 

8-A-4. Assuming that the power supplies of the 34SSA are good, the Instrument Half Splitting 
Technique (paragraph 8-176) should be the first step in isolating turn-on failures. Either the inguard 
or the outguard section could hang up the 343SA’$ turn-on sequence. The front panel indication does 
not tell where the fault is located. Therefore, the Half-Splitting Technique should be used to isolate 
the fault between inguard or outguard section of the 345SA. If an extra 3455A and an In- 
guard/Outguard Service Cable is not available, the method described in Figure 8-45 may be used. 
When it is determined which section of the 3455A is at fault, go to the appropriate troubleshooting 
section in this service group (see paragraph 8-198 and Table 8-3). 

B-A-5. Outguard Troubleshooting (Schematic B). 

a. Check for a clock signal at A3TP5. If no signal exists or the signal level is below 4 V(peak to 
peak), then troubleshoot the outguard clock circuit. 

b. Add A1C46 (part number 0160-3622) if the 3455A does not have one (schematic 8). 

c. Troubleshoot the outguard turn-on circuit (AIDS, U26, and associated components). Check for 
a pulse at tum-on, as shown below, which can be seen at U26 pin 9. This pulse connects to inverter 
U5 which holds data lines D2 through D7 low for the duration of the pulse. The processor should 
turn on at the trailing edge of that pulse. 

I 1" 

"SV 



I Li 

)• - — 60-250mSeC *\ 

d. Check the Nanoprocessor interrupt circuit for correct operation. The IN ENA line should be 
held high and the IN REQ line should either toggle from high to low to high, or remain high. If these 
conditions do not exist, then troubleshoot the interrupt circuit (A1U46, U47, U53, and USS). The 
turn-on circuit (AIU26) must be working before troubleshooting the interrupt circuit. 

e. Using the Signature Analysis routines in Figure 8-H-20 to 8-H-27, troubleshoot the outguard 
logic. If any difficulty is observed using the signature analysis routines, go to Service Group F, 
paragraph 8-F-I for troubleshooting hints. 

f. Using the information in Service Croup F paragraph 8-F-l, troubleshoot the outguard logic. 
B-A-6. Inguard Troubleshooting ISchmatic 5, B, 7). 

8-A-7. The Inguard Mother Board (AlO) and or the A/D Convertor Board (A14) may cause turn-on 
failures. To isolate one from another swap a good A/D convertor board (A14) with the one in the in- 
operative 345SA. If a known good A14 board is not available, use the one from the 34S5A which was 
used in half-splitting the instrument. 

8 A-8. A10 Motherboard Troubleshooting (Schematic 5, B, 7). 

8-A-9. Use the following steps in the order they are presented to troubleshoot the Inguard Mother- 
board (AlO). 



8-40 




Model 345SA 



SERVICE GROUP A 



Section VIII 



a. Check for a clock signal at A10U26 pin 27. If no signal exists or the signal level is below 4 V 
(peak to peak), troubleshoot the inguard clock circuit. 

b. Check the ± 10 V reference voltages at AI0TP8 for + 10 V ± 100 /tV. and at A10TP7 for-IO V 
± 20 mV (schematic 5). If these voltages are too low, the 34SSA may not complete the Auto-Cal 
routine and lock up. 

c. Pin 29 of A10U26 should, under normal condition, be toggling. At tum-on it should have a 20 
msec negative going pulse. If these signals are not present, then troubleshoot the inguard processor 
turn-on circuit. This circuit consists of U24, U19, U9, and their associated circuits. Normally U9 pin 
11 should have a 2 V signal with some ripple and about 1.2 V at pin 10. At turn-on UI9 pin 2 should 
have the approximate pulse as shown below. 




d. A 300 nano second negative pulse for each interrupt should be observed at U32 pin 4. Since it is 
difHcult to observe the pulse, this interrupt circuit can be checked by manually clocking TP 10. Utis 
can be achieved by pulling TPIO low and then releasing it. U26 pin 29 should then toggle. If no toggl- 
ing is taking place, troubleshoot the interrupt circuit consisting of U32A and U27. If there is toggling, 
check T2 or the outguard section (Al). 

e. Check for an A/D waveform (see Service Group E). If none is present, toggle TPIO again and 
look for an A-D waveform. If the waveform appears, then troubleshoot the interrupt circuit con- 
sisting of U32A and U27. 

f. Check for toggling outputs on pins 2, 4, 6, 8, 10, and 12 of U22. 

g. The outputs (pins 9 to IS) of U14 should also toggle with 500 nano second wide negative pulses. 

h. Check operation of latches Ull to UI3, UlS to U17, and ROM U2S. 

i. Make sure that the zero detea signal (U32B pin 12) is not loaded down by anything on the AIO 
board. 

8-A-10. AID Board Troubloahooting (Schamatic 5, 61. 

8-A-l 1 . A couple of checks can be made to troubleshoot the A/D board (A14). One check is to make 
sure that the ± 10 reference voltages are correa. A10TP8 should be 10 V ± 100 and A10TP7 
should be • 10 V ± 20 mV. Another check, is to make sure that there is a zero detect signal at A14 pin 
S. If these checks are good and the 34SSA is still inoperative, go to Service Group E for further 
troubleshooting. 

8-A-12. InguardlOutguard Transfer Circuit Troublashooting (Schamatic 7, 8). 

8-A-I3. At turn-on the outguard processor starts the operation of the inguard processor. The in- 
guard then enables the outguard. Since timing is very critical, the Inguard/Outguard Transfer circuit 
may cause turn-on failures. Depending on where the failure is located, it could show up as either an 
inguard or an outguard malfunaion. When half-splitting the 34S5A, the following checks should be 
made to troubleshoot the transfer circuit. 



a. The signals at A10U26 pins 34 to 37 (inguard) should be the same as those on A3TP4 to TPI 
(outguard). The only exception is the signal at A3TP 1 . This signal should be the same as the signal at 
A10U28 pin 9. if the signals do not agree, check for malfunctions in the inguard light isolators 



8-41 




Section Vlll 



SERVICE GROUP A 



Model 3455A 



A10U34 and U3S, plus associated circuits. Lines F0 and FI transfer data from outguard to inguard 
F0 is the data transfer line and FI is the data transfer rate line), while F2 and F3 send data from in- 
guard to outguard (F2 is the handshake line and F3 is the data transfer line). 

b. HAZ line must be high, if not. check TPIO. 

c. Use the Inguard/Outguard transfer circuit troubleshooting diagram (Figure 8-H-17) for further 
troubleshooting. 

d. The inguard power supply regulators (10U36 to U39) can also cause transfer problems. The 
outguard should power up after the inguard. Check for a slow (more than 2(X1 msec) inguard power 
supply. 



8-42 




Model 3455A 



Section VIII 



SERVICE GROUP B 



8 B-1. AUTO-CAL AND DC TROUBLESHOOTING (INGUARD). 

8-B-2. All 3455A input signals travel through the main dc ampliner and Auto-Cal circuits. In order 
to troubleshoot D.C. and Auto-Cal malfunctions, a good fundamental knowledge of the 3455A’s 
Auto-Cal and self-test routines are required. 



B-B-3. Auto-Cal Constants. 

8-B-4. There are 14 cal constants used in the 34SSA, which are usually zero and full scale voltage 
“readings”. These account for most offsets, gain, and drift of the input op-amps. The “readings” 
are taken periodically when the 3455A is in the Auto-Cal mode. A condensed description of all the cal 
constants are in Table 8-B-I. If a more detailed description of the cal constants is desired, refer to the 
appropriate paragraph in the Theory of Operation section of this manual. 



Table 8-B-I. Aute-Cal Constants 



Coutul 

N'aoibtr 


CoBsiani Oncriplioo 


Circa its 
Used 


Detailed 
Ooe ration 


13 


lo. no Inout - A/D oHsei measurement 




Fsrsoraoh 8-4S 


12 


l±.lratio-± 10 V reference input, A/D 
current ration measurement. 


— 


Paragraph 8-46 


1 1 


10 V offset - XI gain with amplifier input 
tied to grourtd. Input attenuator at XI 
asm. 


Figure 8-B-I 


Paragraph 8-24 


10 


10 V jain - XI gain with amplifier tied to 
10 V reference. Input attenuator at XI 
gain. 


Figure 6-8-2 


Paragraph 8-27. 


9 


Ohms and .5 V offsets - X20 gain with 
amplllier input tied to grourtd. Input anen- 
tuator at XI gain. 


Figure 8-B-3 


Paragraph 8-39 


8 


Ohms and 5 V offsets — X2 gain with 
amplifier input tied to ground. Input et- 
tenuator of XI gain. 


Figure 8-B-4 


Paragraph 8-39 


7 


100 V offset #2 (XI) - gain with amplifier 
input tied to 10:1 attenuator with top of 
10:1 attenuator tied to ground. 


Figure 8-B-5 


Paragraph 8-26 


6 


1000 V Offset - X1 gain with amplifier 
tied to 100:1 attenuator with top of 
100:1 attenuator tied to ground. 


Figure B-B-6 


Paragraph 8-26 


5 


1 00 V gain • X 1 0 gain with amplifier tied 
to 10:1 attenuator with top of 10:1 at- 
tenuator tied to X10 V reference. 


Figure B-B-7 


Paragraph 8-31 


4 


100 V offset ei 1X10) • X10 gain with 
amplifier input tied to 10:1 attenuator 
with top of 10:1 attenuator tied to 
ground. 


Figure 8-B-8 


Paragraph 8-33 


3 


.1 V offset -X100 gain with amplifier in- 
put tied to ground. Input attenuator of X 1 
gain. 


Figure 8 B 9 


Paragraph 8 26 


2 


1 Voffsetfl -X10 gain with amplifier in- 
put tied to ground. Input attenuator of XI 

gam. 


Figure 8-B-IO 


Paragraph 8-25 


1 


1 V offset «2 -X 10 gain with amplifier in- 
put tied to 10:1 divider. Top of divider 
shorted to ground. Input attenuator at XI 
gam. 


Figure 8-B-1 1 


Paragraph 8-30 


0 


1 V gain -X10 gain with amplifier tied to 
10:1 divider with 10 V at the top of the 
divirfer. Inout attenuator at X gain. 


Figure 8-B-I 2 


Paragraph 8-28 



8-43 





Section VIII 



SERVICE GROUP B 



Model 3455A 



8-B-5. When pressing the TEST button of the 3453A, each cal constant is measured. The first cons- 
tant measured is constant number 13. If constant 13 is within certain limits (which are internally set) 
the 3453 A will automatically measure the next constant. If constant 13 is out of its limits the self test 
operation will stop. A number 13 will be displayed on the front panel of the 3433A. In order to 
measure the next cal constant, the TEST button needs to be pressed again. If all the cal constants are 
good, a logic check will be performed. The 34S3A will then display + .8.8. 8. 8.8. 8. 8 when the self-test 
operation is completed. After the self-test operation is finished it will automatically start again. To 
bring the 3433A out of this loop, any function key other than TEST needs to be pressed. 

8-B-6. When the 3433A is in the self-test mode, and it fails this test, it will stop and display an integer 
number. This number is the number of the cal constant that fails. To continue the self-test operation, 
press the TEST button again. After all the cal constant measurements arc taken, and the 3433A is still 
in the self-test mode, another measurement is taken. A dummy cal constant calculation is performed 
in the outguard section of the 3433A. If this calculation is correct (answer should be 10), nothing will 
be displayed. The instrument will then finish the self-test operation. If the dummy calculation is in- 
correct, a non-integer number (e.g., 9.998 or 10.002) will be displayed on the front panel. Again, to 
continue the self-test operation the TEST button needs to be pressed. 

8-B-7 When the 3433A is used with the HP-IB system and if any of the cal constants fail, the 3435A 
will not output any readings. If only the dummy calculation fails then the dummy calculation answer 
will be output on the bus. If the 3433A passes its self-test then a 10 will be output on the bus. 

8-B-8. The 3433A should not be troubleshoot for Auto-Cal malfunctions in the self-test mode. If any 
cal constants fails, including the dummy constant, use the cal constant service procedure (paragraph 
8-B-lO) for troubleshooting. If only the dummy constant fails try replacing the ALU’s (A1U28, 30), 
and their associated circuits, in the outguard section (schematic 8). If the dummy constant still fails, 
go to the Outguard Troubleshooting Service Croup (Service Group F). 




Figure 8-B-L AutoXil Conmnt «11 (10 V OHsat). 




Figure 8-8-2. Auto-Cel Constant #10 (10 V Gain). 



8-44 








Model 3455A 



SERVICE GROUP B 



Section VIII 




Figure B-B-3. Aute-Cal Contunt US {10 K, 100 K. aid 10 M Offsau). 




Figure 0 0-4. Auto-Cel Cenetant #8 (10 K. 100 K, and 10 M Offtets). 



8-45 













Section VIII 



SERVICE GROUP B 



Model 3455A 




Figira 8-B-S. Aute Cil ConsUnt D>7 (100 V OHsat #2). 




Figure 8-B-6. AutoCal Constant Mt 11000 V Offut). 



8-46 











Model 3455A 



SERVICE GROUP B 



Section Vlll 




Figure 8-B-7. Auto Cal Constant (100 V Gain). 




Figure 8-B-8. Aulo-Cal Consunt #4 (100 V OHset #t). 



8-47 












Section Vill 



SERVICE GROUP B 



Model 3455A 




Figure 8-B-9. Auto-Cel Conttent #3 (.1 V Offset}. 




Figure B-B-10. Auto-Cel ConsUnt #2 (1 V Offset #1}. 



8-48 
















Model 345SA 



SERVICE GROUP B 



Section VIII 




Figure 8-B-11. Auto Cei Constant #1 (1 V OHMt HI]. 




Figure B-8-12. Auto-Cel Constent #0 II V 6ein|. 



8-49 










Section VIII 



SERVICE GROUP B 



Model 3455A 



8 B-9. Auto Cal Switch Closures. (Schenfatic 1, 5, 6, 7). 

8-B-lO. Various tables are included in this service group which can be used as troubleshooting aids 
for Auto-Cal failures. Table 8-B-2 shows the closed switches for the measurement of Auto-Cal cons- 
tant 1 1 to 0. The function of several gates used in the Auto-Cal mode of the instrument are shown in 
Table 8-B-3. To find the switch drive voltage levels for Auto-Cal constants 13 to 0, Table 8-B-4 
should be used. 

B-B-11. Cal Constants Service Procedure. 

8-B-12. When the 34S5A is in the Auto-Cal mode, the instrument measures one or more cal constant 
between each sample. The number of cal constants measured depends on the sample rate. In order to 
reach a certain cal constant measurement, use the following procedure. 

a. Press the DCV and HOLD/MANUAL buttons and then the AUTO CAL button of the 3455A. 
The instrument should now be stopped at a certain cal constant. 

b. Make sure the 34SSA is out of the Auto-Cal mode. Press the AUTO CAL button again, if 
necessary (the light in the AUTO CAL button should be ofO- 

c. To locate the desired cal constant or to go through the cal constants completely, briefly press the 
AUTO CAL button twice to turn Auto-Cal on and off. Each time Auto Cal is turned on and off, the 
Auto-Cal circuitry will attempt to decrement through the cal constants from 13 to0, and the return to 
constant 13. 



NOTE 

The A UTO CAL button should not be pressed on and off too fast or loo 
slow, because the3455A may remain in the same cal constant or advance 
past more than one cal constant. A few tries may be necessary to decre- 
ment one cal constant step each time. 



Table 6 B-2. Auto Cal Switch Closures. 





Test 




11 


ID 


9 


8 


7 


6 


5 


4 


3 


2 


1 


9 


A10Q2 


X 




X 


X 










X 


X 






A 1004 




“3^ 






















A10Q1S 










X 




X 


X 










A10Q16 












X 










X 


X 


A10Q18 






X 












X 








A10O19 


X 


X 






X 


X 














A10O21 


1 






it 






X 


X 




X 


X 


X 


A 10023 






X 


X 


















A10Q27 






X 












X 








A10O28 






X 












X 








A10O29 
























X 


A10Q31 
























X 


A 10032 
























X 


A10Q33 














X 












A10O34 










X 


X 




X 










A10Q3B 










T 




It 


X 










A10O36 






















X 




A 10038 






X 












X 




X 


X 


A10Q39 












X 














A10040 












X 












A10K6 










X 


X 


5 


X 











X - Closed (ON) 



8-50 





Model 3455A 



SERVICE GROUP B 



Section VIII 



Table B B-3. Gate Function in Auto-Cal. 



Gates 

UtcO 


Faaclfon 


Q19 


XI Gain 


021 


X10 Gain 


022 


X2 Gain 


028, 026 


XI Suffer 


029, 031, 032 


TV Referertce 


036 


10:1 Input to Ground 


018 


+ 100 Gain 


038 


10:1 Victual Ground 


039 


100:1 Attenuator 


03S 


10:1 Attenuator 


016 


10:1 Attenuator to Input 


016 


100:1 Attenuator to Input 


033 


+ V Reference to Attenuator 


034 


Attenuator Input to Ground 


02 


Low Voltage input to Ground 


04 


+ V Reference to Input 



Table B-B4. Switch Driver Voltage Levels. 



— 


Pin 
















Test 














Pin 


Oesignalor 


No. 


0 


1 


2 


3 


4 


5 


6 


7 


8 


9 


10 


11 


12 


13 


No. 


U4 


1 


0 


0 


0 


a 


•24 


-24 


-24 


-24 


9 


9 


9 


9 


9 


9 


1 




2 


-24 


-24 


•24 


•24 


-24 


•24 


-24 


•24 


9 


9 


-24 


-24 


-24 


•24 


2 




S 


L 


L 


L 


L 


L 


L 


L 


L 


H 


H 


L 


L 


L 


L 


5 




7 


H 


H 


H 


H 


L 


L 


L 


L 


H 


H 


H 


H 


H 


H 


7 




9 


L 


L 


L 


L 


H 


L 


H 


H 


L 


L 


L 


L 


L 


L 


9 




10 


L 


L 


L 


L 


H 


L 


H 


H 


L 


L 


L 


L 


L 


L 


to 




13 


■*9.5 


■•9.5 


♦9.5 


♦9.5 


•24 


♦9.5 


-24 


•24 


*9.5 


♦9.5 


+9.5 


+9.5 


+9.5 


+9.5 


13 




14 


-24 


-24 


-24 


•24 


9 


•24 


9 


9 


-24 


-24 


-24 


•24 


-24 


•24 


14 


US 


1 


-24 


•24 


-24 


•24 


•24 


•24 


24 


•24 


•24 


•24 


-24 


•24 


-24 


•24 


1 




2 


-24 


-24 


-24 


0 


-24 


•24 


•24 


•24 


•24 


9 


-24 


-24 


-24 


-24 


2 




S 


L 


L 


L 


H 


L 


L 


L 


L 


L 


H 


L 


L 


L 


L 


5 




7 


L 


L 


L 


t 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


7 




9 


H 


H 


H 


L 


H 


H 


L 


L 


H 


L 


L 


L 


H 


H 


9 




11 


L 


L 


L 


L 


L 


L 


H 


H 


L 


L 


H 


H 


L 


L 


11 




13 


-24 


-24 


-24 


-24 


-24 


•24 


9 


9 


-24 


-24 


♦9.9 


9 


•24 


-24 


13 




14 


■H 


0 


9 


•24 


9 


+1 


-24 


-24 


9 


•24 


•24 


•24 


♦1 


♦ 1 


14 


U6 


1 


■►1 


0 


-24 


•24 


•24 


•24 


9 


•24 


•24 


-24 


24 


•24 


♦1 


+1 


1 




2 


•24 


-24 


•24 


9 


•24 


•24 


•24 


-24 


•24 


9 


•24 


•24 


•24 


-24 


2 




5 


L 


L 


L 


H 


L 


L 


L 


L 


L 


H 


L 


L 


L 


L 


5 




7 


H 


H 


L 


L 


L 


L 


H 


L 


L 


L 


L 


L 


H 


H 


7 




9 


L 


L 


L 


L 


L 


L 


H 


L 


L 


L 


L 


L 


L 


L 


9 




11 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


H 


L 


L 


L 


11 




13 


•24 


-24 


-24 


-24 


-24 


•24 


-24 


-24 


•24 


•24 


♦9.9 


•24 


-24 


-24 


13 




14 


•24 


-24 


•24 


•24 


•24 


-24 


9 


-24 


•24 


•24 


-24 


•24 


•24 


-24 


14 


U8 


1 


•24 


-24 


•24 


-24 


•24 


•24 


•24 


•24 


•24 


•24 


24 


•24 


-24 


•24 


1 




2 


•24 


9 


•24 


•24 


•24 


-24 


9 


24 


•24 


24 


-24 


•24 


-24 


24 


2 




4 


H 


L 


H 


H 


H 


H 


L 


H 


H 


H 


H 


H 


H 


H 


4 




7 


L 


1 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


7 




9 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


C 


L 


L 


9 




11 


B 


B 


H 


H 


8 


8 


B 


B 


H 


H 


B 


H 


L 


L 


11 




13 


•24 


•24 


9 


9 


•24 


•24 


•24 


•24 


9 


e 


•24 


9 


-24 


•24 


13 




14 


•24 


•24 


•24 


•24 


•24 


-24 


-24 


•24 


-24 


-24 


•24 


•24 


•24 


•24 


14 


U9 


1 


-24 


-24 


-24 


•24 


9 


-1 


•24 


9 


•24 


-24 


24 


24 


■24 


•24 


2 




2 


•24 


•24 


-24 


•24 


•24 


-24 


•24 


•24 


•24 


-24 


•24 


•24 


•24 


•24 


2 




S 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


5 




7 


L 


L 


L 


L 


H 


H 


L 


H 


L 


L 


L 


L 


L 


L 


7 




9 


H 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


L 


H 


H 


9 




11 


H 


H 


H 


H 


H 


H 


H 


H 


H 


H 


H 


H 


H 


H 


11 




14 


«9.5 


-24 


-24 


•24 


-24 


-24 


-24 


•24 


•24 


-24 


-24 


•24 


+9.5 


+9.5 


14 



The symbol* L and H refer to TTL loflic levels where L is < B V dc and H is > 2.2 V dc. 



8-51 






Section VIII 



SERVICE GROUP B 



Model 3455A 



d. To determine which cal constant is measured, connect a high input impedance DVM (10 V 
range input impedance > IO>o ohms) to one of the points shown in Table 8-B-5. 

e. By stepping through the cal constants from constant 13 to 0 and monitoring one of the 
points in Table 8-B-S, every cal constant step can be located. 



NOTE 

The voltages listed in Table 8-B-5 are approximate and should only 
be used to locate Auto-Cal constants and for troubleshooting. 



8-B-13. By using the cal constants stepping procedure in conjunction with Table 8-B-5, any 
one constant step can be located. When using this method and the 345SA is malfunctioning, 
or possibly two conditions in Table 8-B-4 may be inoperative. (Example; Readings at 
A10TP4 and TP2 are bad). It is very unlikely, however, that all four conditions are in- 
operative. If this should occur, then check the + 10 V reference and/or the inguard logics. 



Table 8-B S. Cal Constant Monitoring Points. 





13 12 11 10 9 8 7 6 5 4 3 2 1 0 


Approximate A 1 0TP4 
Voltage 

Voltage at the Multiplexer 
Mode (Source of A10QY) 
Voltage at the Junction of 
A10K6 and A10R47 

A10TP2 Voltage 


0 0 0 10 0 0 0 6 -10 0 0 0 0 10 

- - - 10 

----- - - - -9.9009 - 

® ® - 



8 B-14. Switch Closure Table. 

8-B-15. Most of the switch closures used in the 345SA are listed in Table 8-B-6. This table lists the 
previous closures dependent on the range, function, and Auto-Cal mode of the 34SSA. For 
troubleshooting malfunctions of the various operations of the instrument, this table may be very 
helpful. 



8 B-16. Auto-Cal Troubleshooting (Schamatie 1, 7). 

8-B-17. Most Auto-Cal failures also show up as dc failures and should be repaired first. These 
malfunctions usually show up as a failure in the self-test mode of the 345SA. The following are a cou- 
ple of hints to troubleshoot these malfunctions. 



a. Set the 3455A to the self-test mode and find out which cal constants are failing. Take the 3455A 
out of the self-test mode (press any other function button). Using the cal constants service procedure, 
go to the bad cal constant. While refering to the various tables and figures in this service group, 
troubleshoot the bad constant. 



8-52 




5? S S 5? S 



Model 3455A 



SERVICE GROUP B 



Section VllI 



Table 8-B-6. 3455A OVM Switch Closures. 




DtV)C« Sc»«ct • 
AIOUW 



Ot*nc« SH«ct 7 
A10U16 



Switetted 

Compor>««t 



SwMChin^ 

Lin4 



2 g<U<BO<EO 3 S 3 



5 '2 X y S a 

5 f I ! i ! 



n*A«* 


Op*raiiQn 




1 


ACF«$i 


0 


1 


0 


1 


0 


0 


10 


ACPMt 


0 


1 


1 


1 


0 


0 


100 


AC-P«1 


0 


0 


0 


1 


1 


0 


1000 


AC F«it 


0 


0 


1 


1 


1 


0 


1 


AC*Norm 


0 


1 


0 


1 


0 


1 


10 


AC'Norm 


0 


1 


1 


1 


0 


1 


100 


AC*Nom> 


0 


0 


0 


1 


1 


1 


1000 


ACNprm 


0 


0 


1 


1 


1 


1 




1 


0 1 


0 


1 


0 


0 


0 


X 


0 


0 


1 




0 1 


0 


1 


0 


1 


0 


X 


0 


0 


0 


1 


0 1 


0 


1 


0 


0 


0 


X 


1 


0 


0 


0 


0 1 


0 


1 


0 


0 


0 


0 


1 


0 


0 


0 


0 1 


0 


1 


0 


0 


0 


1 


1 




0 





0 


1 


0 


1 


0 


0 


0 


X 


0 


0 


1 




0 


1 


0 


1 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


t 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


1 


0 


1 


0 


X 


0 


0 


0 




0 


t 


0 


t 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


1 


0 


0 


0 


X 


0 


0 


1 




0 


1 


0 


1 


0 


0 


0 


X 


0 


0 


1 




0 


1 


0 


1 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


1 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


1 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


1 


0 


1 


0 


X 


0 


0 


0 




0 


1 


0 


t 


0 


0 


0 


X 


0 


0 


t 





0 


1 


0 


1 


0 




0 


t 


0 


1 


0 




0 


} 


0 


1 


0 




0 


1 


0 


1 


0 




0 


1 


0 


1 


0 




0 


t 


0 


1 


0 




0 


1 


0 


1 


0 




0 


1 


0 


1 


0 




0 


t 


0 


t 


0 




0 


1 


0 


1 


0 




0 


1 


0 


1 


0 




0 


1 


0 


1 


0 




0 


0 


X 


0 


0 


1 


1 


0 


X 


0 


0 


0 


1 


0 


X 


0 


0 


0 


1 


0 


X 


0 


0 


0 


1 


0 


X 


0 


0 


0 


0 


0 


X 


0 


0 


1 


0 


0 


X 


0 


0 


1 


1 


0 


X 


0 


0 


0 


1 


0 


X 


0 


0 


0 


1 


0 


X 


0 


0 


0 


1 


0 


X 


0 


0 


0 


0 


0 


X 


0 


0 


1 



Not* X lAdtuwt “Oon'l Cart " 

0 l«HOt*t«t (0** tttf COAICOI ••A* will be HI ot* Hro* •> tfll cKior rn**>ur*m«nt tttt* 



8-53 




















































Section VIII 



SERVICE GROUP B 



Model 3455A 



b. If unable to repair the Auto-Cal failure, Table 8-8-6 may be helpful if applicable. The dc in- 
operative section paragraph 8-B-18 in this service group may also be helpful. 

8 B-1B. DC Inoperative (Schematic 1). 

8-B-I9. When the dc function of thO 34SSA is inoperative, it can also show up as an Auto-Cal 
failure. These failures should be serviced using the information in paragraph 8-B-3 to 8-B-lS in this 
service group. Some of dc and Auto-Cal failures may be serviced by using the following procedures. 



Table 8-B-7. Possible Aute-Cal Failure Causes. 



Cal Constants Failed 


3455A Display 


Possible Cause 


13 12 


1 1 


10 


9 


8 


7 


6 


5 


4 


3 


2 


1 






Shorted A14U1d 


12 




10 










5 


4 


3 






0 


.0757 


Open A1 4C2 


12 






9 








5 


4 


3 










A10Q36 Shorted 




1 1 


10 


9 


8 


7 


6 


5 


4 


3 


2 


1 


0 


.0007 


Gate Bias 




1 1 


10 


9 


8 


7 


6 


5 


4 


3 


2 


1 


0 


.0000 


DC Pre-amp 




1 1 


10 


9 


8 


7 


6 


5 


4 


3 


2 


1 


0 


.0074 


DC Pre-amp 




11 




9 


8 


7 


6 


5 


4 


3 


2 


1 


0 


9.8438 


A10Q4 Shorted 




1 1 


10 






7 


6 














.0000 


A10Q19 Open 




1 1 




9 


8 










3 


2 








A10U3 






10 


9 








5 




3 








9.7650 


A 10Q 16 Shorted 






10 










5 










0 


.0000 


A14Q3 Open 






10 


9 












3 






0 




A10Q15 Shorted 






10 








6 


5 








1 


0 




A10Q18 Shorted 






10 


9 








5 










0 


9.5703 


A10Q2 Shorted 






10 






















2.5026 


A10Q4 Open 






10 


9 


8 










3 


2 








A10Q21 Shorted 
A 1002 Open 








9 




7 


6 


5 


4 


3 




1 


0 




A10U18 or A10037 








9 




7 


6 


5 


4 


3 




1 


0 




Reference Supply 








9 




7 


6 


5 


4 


3 


2 


1 


0 




A 1002 9 and/or A 10031 Shorted 








9 








5 




3 






0 




A 1003 9 Shorted 








9 












3 










A10U3 or Open A100A18 








9 












3 






0 




A10035 Shorted 








9 






















A10Q27 Open 








9 


8 






5 


4 




2 


1 


0 




A10027 Open 
A 10021 Open 












7 




5 


4 








0 




A 1002 7 Shorted 












7 




5 


4 












A10O15 Open 












7 


6 




4 






1 


0 




A10Q3 Shorted or A10K5 Open 
A10O16 Open 
















5 


4 








0 




A10Q28 Shorted 
















5 










0 




A 1 002 2 or A 1 00 1 9 Shorted 
















5 














A10035 or A10K6 Open 
















5 












6.7542 


A 1 0033 Open or A 1 0038 Shorted 
A14 Board or A10034 Shorted 




























X.XXXX 


Where X is any number go to Service 
Group 6 



B-6-20. Leakage and Other Various Malfunctions. 



8-B-21. The following quick leakage test may be used to isolate most leakage failures. 

a. Set the 3455A to the DCV function 10 V range, with Auto-Cal off. 

b. Short and then open the input terminals of the instrument and note the change in readings on 
the display. 



8-54 












Model 345SA 



SERVICE GROUP B 



Section VIII 



c. If the reading changes faster than .25 V per second, there is leakage on the multiplex node. If 
the reading on the display changes positively, either AlOQS or Q17 may be leaky. If the change is 
negative, A10Q2, Q3, Q4, Q13, QIS, or QI6 may be leaky. 

8-B-22. The test in the above paragraph, paragraph 8-B-21, is a quick leakage test and should find 
most leakage failures. A more thorough test involves checking zero and full scale voltages on all dc 
ranges. Start with the 10 V range and the other ranges in the following order: 1 V, 100 mV, 100 V, 
and 1000 V ranges. The following paragraphs contain the procedures which should be used for 
leakage failures. 

B B-23. 10 V Ranga or Constant 10 and 11 Fail. 

a. Set the 34S5A to the 10 V range. Auto-Cal on and short the input terminals. If the reading on 
the display is positive (more than 5 counts), AlOQl may be leaky. If the reading is negative (more 
than 5 counts), Q2 may be leaky. To doublecheck for a defective Q1 and Q2, note the reading on the 
I V and 100 mV ranges. The bad reading should also be present on those ranges. 

b. Apply + 10 V or -10 V to the input terminals of the 345SA. Make sure the readings are within 
specification. Check the reference voltages and adjust them, if necessary. A10TP8 should be -f 10 V 
± 100 pV and TP7 should be • 10 V ±20 mV. If the reference voltages are good and the instruments 
readings is low, A10Q4 may be leaky. 

B-B-24. 1 V Range or Constant 0, 1, and 2 Falls. 

a. For the 1 V range check, do the procedure as explained in paragraph 8-B-23a. 

b. For the 1 V range full scale check, do the following: 

1 . With the 34S5A set the 1 V range and Auto-Cal off, apply -f 1 V to the input terminals. A 
voltage of -f 1 V should appear on the multiplex mode and -t- 10 V should be at A10TP4. If the 
multiplex mode reading is bad,' troubleshoot the input circuit. If the reading at TP4 is bad, 
make sure A10Q21 is turned on. Check for leaky Q22, CR12, CR13, or a defective U3. If TP4 
reads good, set up the 34S5A for the self-test mode by pressing the TEST button. Check for cal 
constant 0 failing and if it does, troubleshoot the failure by using the procedure of paragraph 
8-B-lO. Continue with the next step if constant 0 does not fail. 

2. By using the procedure of paragraph 8-B-lO, step to cal constant 0. Adjust the active at- 
tenuator for a zero reading, as read at AlOTPl (adjust R66). Measure the voltage at J3 pin 9 for 
exactly -t- 1 V. If the reading is low, Q39 or Q18 may be leaky. If the reading is good, check the 
operation of Q36. This can be done by changing the high voltage amp offset. The 1 V reading at 
J3 pin 9 should change, because the gain of the I V range is changed. 

B-B-25. 100 mV Range or Constant 3 Fails. 

a. For the 100 mV range zero check, do the procedure of paragraph 8-B-22a. 

b. For the 100 mV range full scale check do the following: 

1. Apply + 100 mV to the input of the 3455A. The instrument should be set to the 100 mV 
range with Auto-Cal. Measure for approximately -t- iO V at AI0TP4 and 1/10 of this voltage at 
TPS. TP2 and TP6 should read approximately the same as TP5. If the reading at TPS and TP6 
are incorrect, check the power supplies of U3 (pins 4 and 7). The supplies should have approx- 
imately the voltage at TP6 ± 5 V. Troubleshoot U3 and associated circuitry if necessary. 

2. Adjust the high voltage amp (A10U18) to zero, as read at TPl (adjust R66). Measure the 
voltage at the 10:1 divider (J3 pin 9) for exactly 1/10 the voltage at TP2. If this voltage is incor- 
rect, QI6 or Q2I may be leakly. 

B B-2B. 100 V Range or Constants 5, 4, and 7 Fail. 

a. The active attenuator can be checked by applying -i- 10 V to (he input of the 34SSA. With the in- 



8-55 




Section VIll 



SERVICE GROUP B 



Model 3455A 



strument set to the 100 V range and with Auto-Cal on, measure for any readings at AtOTPl. If this 
voltage is incorrect, check the bias of the input FET’s by shorting the drains of Q38 to the sources of 
Q38. TPl should now read zero. The drains of Q37 should be approximately + 10 V and the sources 
of Q3 should read between + 1 V and + 2 V. Troubleshoot the active attenuator, if the readings are 
bad. 



b. For the 100 V range zero check, set the 34S5A to the 100 V range with Auto-Cal off. Adjust R66 
for a zero reading at TPl. If unable to adjust for a zero voltage, check for a leaky C21, C22, C26, 
CR32, or Q37. If the zero reading is good, the 34S5A should display 0 V ± 1 count, a short time after 
Auto-Cal is turned on. If an offset remains on the display, Q36 may be defective. 

c. For a 100 V range full scale check, observe for a cal constant 5 failure, when the 34S5A is in the 
self-test mode. If cal constant 5 fails, troubleshoot its circuitry by using the procedure of paragraph 
8-B-l 1. If cal constant 5 passes, step to cal constant 5 by using the procedure of paragraph 8-B-I I. If 
cal constant 5 passes, step to cal constant 5 by using the procedure of paragraph 8-B-l I. Measure 
TP2 for approximately -1 V and measure for approximately -.1 V at the 10:1 divider (pin 9 of J3). 
Check for exactly -i- 10 V at the Junction of R47 and Q33, and for + 9.9 V at the junction of R47 and 
K6. If 10 V is measured at R47 and K6 instead of + 9.9 V or R63 may be open. 

8 B-27. 1000 V Range or Constant 6 Fails. 

a. For the 1000 V range zero check, remember that some of the same circuits are used in the 100 V 
range. The 100 V range zero and gain should be working before troubleshooting the 1000 V range. 
Check for the proper switch closures used in cal constant 6 (use the procedure of paragraph 3-B-1 1 to 
locate constant 6). 

b. For a 1000 V gain check, use the procedure of paragraph 8-B-24b. 

c. Set the 34SSA to the 1000 V range with Auto-Cal on, and apply 1(XX) V to the input terminals. If 
the reading on the display changes intermittently from 100 counts to 200 counts, A10K5 or K6 may be 
breaking down. KS and K6 can be checked by connecting channel A of an oscilloscope (set to 20 
V/div) at the Junction of R47 and K6. 

WARNING 



For safely, connect the scope probe lo the 100 K resistor R47. 

Connect channel B of the scope (2 V/div) to pin 10 of U24. Set the scope to the chop mode and trig- 
ger on channel B. If channel B indicates a 5 V spike when arcing occurs, as seen on channel A, then 
K6 may be breaking down. If the indication on channel B appears to be good, KS may be defective. 
C21, C23, or the input node of Q37, may also be defective. 

8 B-2B. Various Other Malfunctions. 

8-B-29. Shorted FET’s. 

a. Occasionally FET’s on the multiplex node may short. Two ways can be used to isolate shorted 
FET’s. 



1. Measure the gate to on resistance with an ohmmeter. 

2. Short the input of the 34SSA and turn the high resolution and Auto-Cal functions off. 
While monitoring A10TP3 step through all the dc ranges (1 V, 10 V, etc.) and ac functions. 
Make sure Auto-Cal is turned off after every range and function change. If TPS dips to -24 V, a 
FET may be shorted. Usually, the defective FET is normally turned off in that particular range 
or function. 

b. If AlOUl gets very hot Ul, Q2, Q13, or Q14 could possibly have their gates shorted to their 
can. 



8-56 





Model 3455A 



SERVICE GROUP B 



Section VIll 



c. Shorted FET's and U! may show up as on "OL” indication on the display of the 3455A. This 
condition can be checked by measuring the voltages at TP4. If the voltage reads approximately + 16 
V or -16 V, then measure TP3. If TP3 appears to be floating or is at a -24 V level, short the multiplex 
node to ground. If the “OL" condition disappears, a FET on the multiplex node is shorted. Use the 
procedure of paragraph 8-B-29a, b to rind the shorted lET. Some possible.FET failures may be Q3, 
Q4. Q15. Q19, or Q21. 

6-B-30. Other Troubleshooting Hints. 

a. If either A10K5 or K6 slicks closed, it may damage the other relay. Both should be replaced. 

b. A sticking KS could also damage R47, when K6 closes. 

c. If 9.9009 V is displayed on the 100 V and 1000 V ranges of the 3435A with the input open, 
A10K6 is probably shorted. 

d. AlOLl should not be too close to R63. Arcing could occur for 1000 V inputs. 

e. With Auto-Cal on and A10R66 adjusted, the instrument should temporarily indicate an offset 
on either the I V, 100 V, or 1000 V ranges. If the offset remains, Q36 may be open. 

f. If all tests pass and the 100 mV range is out of tolerance, then AI0Q28 may be open. 

g. If all tests pass the 34SSA reads zero volts on the 1000 V range with an input voltage, Q39 may 
be open. 

h. If all tests pass and then 100 mV, 1 V, 100 V, and 1000 V ranges are out of tolerance, then 
AI0Q29 or Q31 may be open. 

i. If all tests pass and the 100 V and 1000 V ranges are out of tolerance, then A10Q4 may be open 
or K6 may be shorted. 

j. If Auto-Cal constant S fails and the 100 V and 1000 V ranges are way out of tolerance, then 
A10R46 or R63 could have changed value. 

k. If 17 V appears on the multiplex node, check for a defective A10Q15, Q18, CR12, or U12. 

8 B-31. General Noise. 

8-B-32. Noise in the 34S3A may show up in one or more functions. If more than one function is 
noisy it usually indicates dc noise. The dc noise source should be found first, before troubleshooting 
any ac or ohms noise. Go to Table 8-3, to find the correct service group for ac and ohm noise. 

8-B-33. DC Noise (Schematic 1, 5, and B). 

a. Equal amount of noise on all ranges: Noise of this nature is usually caused by the output of the 
dc amplifier (A10U2), the reference assembly (All or A20), or the A/D convertor (A 14). The follow- 
ing two methods can be used to find noise causing circuits. 

1. Try replacing the A/D convertor board (AI4) with a known good one. If the noise disap- 
pears, go to Service Group E paragraph 8-E-14 for further troubleshooting. If the noise is still 
present or a good A/D board is not available, use the next procedure. 

2. Set the 3435A to the 10 V with Auto-Cal off. Using a high impedance DVM (10 V input 
impedance > 1010 ohms), measure the 10 V reference at A10TP8. If the reference voltage is 
noisy, replace the reference assembly (All or A20). If TPS is good, unsolder R38 at the 
multiplex node. With a clip lead, connect TPS to the unsoldered end of R38. Measure the 
voltage at TP4. If TP4 is noisy, U2 and its output circuit may be noisy. If the voltage at TP4 is 
quit, the A/D convertor is most likely noisy. Go to Service Group E paragraph 8-E-14 for fur- 
ther troubleshooting. 



8-57 




Section VIII 



SERVICE GROUP B 



Model 34S5A 



b. Noisy on all ranges. 

1. Check the + 10 V reference voltage at A10TP8. 

2. Check all inguard power supplies for oscillations. Clock ringing bn the supplies are nor- 
mal and should be ignored. A defective AIOU36 may be noisy. 

c. Noise on positive input voltages only: Check the -10 V reference voltage at A10TP7 for noise. 
The 34SSA should be in HOLD/MANUAL and with Auto-Cal off. The noise should not be greater 
than the + 10 V reference noise measured at TPS. If the -10 V reference is too noisy, replace U7. 

d. Readings at 1/10 scale noisy and several counts low on any range: A14C2 may be defective. 

e. Noise on the 100 mV range; Short the input of the 3455A with Auto-Cal off. Measure the 
voltage level at AlOTPl. It the voltage is noisy, try replacing R69, R71, U18, or Q37. If TPl is not 
noisy, measure with a DVM across TPS and TP6. The low input of the DVM should be connected to 
TP6 and the high input to TPS. If excessive noise is measured, replace U3. 

f. Noise and S counts to 10 counts turnover on the 1 V range: Replace A10R41 to R43. 

g. 1000 V dc noisy; AlOKS, K6, or R63 may be arcing inside. If KS or K6 are replaced, replace 
both of the relays. 

h. Various other possible noise repairs. 

1. AI0Q7 or Q8 may occasionally oscillate. Care should be taken when measuring with an 
oscilloscope. A probe connected to the output of U2 or the emitter of Q7 may cause oscillation. 

2. A10U2 or QiS may also cause noise. 

3. Clean the front/rear input switch (SI). 



8-58 




Model 3455A 



SERVICE GROUP C 



Section VIII 



8 C l. AC CONVERTOR TROUBLESHOOTING. 

8-C-2. True RMS Convtrtor Sarvieing (Schamatic 3). 

8-C-3. Before troubleshooting the 345SA's True RMS Convertor, the instrument should operate 
properly in the dc mode. Verify for the correct operation of the dc section, before servicing the ac 
convertor. The following procedure should be followed before troubleshooting or repairing the ac 
convertor. 

a. Check the dc operation of the 3455A. Verify for correct full scale and zero scale readings on all 
ranges. 

b. Set the 34SSA to the 10 V range, ac function, and short the input. 

c. Check for approximate zero levels at A1STP8 and TPS, with the low input of the meter con- 
nected to TP6 (go to paragraph 8-C-4 or 8-C-6 if bad). 

d. Short TP3 to TP6 and measure the voltage at TPI. TPl should read approximately zero. 
Remove the short (go to paragraph 8-C-8 if bad). 

e. Check for proper biasing of A1SU2. The voltage at U2 pin 2 should be between -2 mV and -3 
mV. Repad R2I if necessary (R2I padding list is in the parts list). 

f. Remove the short form the input of the 34SSA. Apply a 10 V, 100 Hz sinewave at the input ter- 
minals. Check for the following voltages. 

1. With an oscilloscope, check for a sinewave at A15TP8. The amplitude of the sinewave 
should be approximately 2.8 V peak to peak with no shift in the dc level (go to paragraph 8-C-4 
if bad). 

2. A halfwave rectified sinewave should be observed at TPS. The amplitude of the 
waveshape should be approximately 1.4 V peak to peak, with no shift in the dc level (go to 
paragraph 8-C-6 if bad). 

3. The waveshape shown below with an approximate + .7S V dc level, should be observed at 
TP4 (go to paragraph 8-C-8 if bad). 

0 V 

4. The waveshape shown below with an approximate -1 V dc level, should be observed at 
TP3 (go to paragraph 3-C-8 if bad). 



0 V 




5. Check for approximately -f .S V dc at TP2 (go to paragraph 8-C-8 if bad). 

6. Check for approximately +6.67 V dc at TPl (go to paragraph 8-C-8 if bad). 

7. Check for approximately zero volts at TP7 with the 34SSA in the 10 V or 1000 V ranges. 
This voltage level should change to approximately -IS V when the instrument is switched to the 
1 V or 100 V ranges (troubleshoot gain switching circuit, if bad). 



8-S9 




Section Vlli 



SERVICE GROUP C 



Model 3455A 



g. If all the above checks are good and the 34SSA displays approximately 10 V ac (with 10 V, KX) 
Hz input), the RMS convertor should be ready for calibration. If the reading is incorrect, A10Q3 may 
not be turned on or may be defective. 

B-C-4. Preamplifisr and Input Attenuator Circuitry. 

8-C-S. The waveshape at TPS appears to be incorrect, try the following checks (except where noted, 
the input signal should be a 10 V, 100 Hz sinewave). 

a. Check for the correct power supply voltages at U6 pins 4 and 7. Pin 4 should have approximate- 
ly -IS V and pin 7 should have approximately + IS V. 

b. Set the 34SSA on the 10 V range and short the input terminals. Make sure TPS can reach zero 
volts, when adjusting R6S. If unable to reach zero, try changing R77 to 412 kO (part number: 0698- 
4540). If R77 is a 412 K resistor already, replace U6. 

c. If the signal at TPS is riding on a high dc level, make sure CR7 and Q20 are not touching any 
shielding. Also make sure Q19 is not touching the heat sink of U6. Check CR7 and Q20 for shorts. 

d. If the zero reading at TPS is good on the 10 V and 1000 V ranges and bad on the I V and 100 V 
ranges, try the following checks. 

1. Check the gain switching circuitry of Q16 to Q19, and US. Make sure TP7 reads approx- 
imately zero volts on the 10 V and 1000 V ranges. On the 1 V and 100 V ranges TP7 should read 
approximately -15 V. 

2. If the gain switching is correct, lift the drain or source of Q19. Check for a zero reading at 
TPS with the 3455A in the 1 V range. If the reading is good, replace Q19. 

3. If the reading at TPS is still bad, short the drain to the source of Q18. If the reading is then 
good, replace Q18. 

4. If the reading at TPS is still bad, short TPS to the junction of R86 and R87. If the reading 
is corrected, troubleshoot the feedback network. 

e. If the 3455A has a history of bad QI9’s replace Kl, K3, and QI8. Q18 may be damaged if Q19 
has been damaged. The timing of Kl and K3 could be incorrect, causing Q19 to be destroyed by a 
I(XK) V input. Check ac calibrator output for any spikes and make sure the 10'’ V Hz limit has not 
been violated. 

f. If it becomes necessary to replace the matched set of resistors R76, R86, and R91, the new set 
should be properly aged. Do the following procedure. 

1. Set the 34SSA to the 10 V range and apply a 10 V, 100 Hz signal to the input. Note the 
reading on the display. 

2. Apply a 1000 V at 100 Hz signal to the input. Leave the 1000 V connected for about two 
minutes. 

3. Remove the 1000 V signal and reapply the 10 V at 100 Hz signal to the input. After a cool- 
ing down period (less than 2 minutes), the reading on the display should have not changed more 
than 25 counts from the reading in 1 above. Replace R76, R86, and R91 if necessary. 

g. If it becomes necessary to replace the matched set of resistor R91 and R93, they also need to be 
aged. Use the procedure in f above. The only exception to the procedure is to have the aging done on 
the 100 V range rather than the 10 V range. A 100 V at 100 Hz signal should also be applied in place 
of the 10 V signal. 

h. Other circuits on the A15 board may cause preamplifier malfunctions. The preamplifier can be 
isolated from the other circuits by lifting R52 and R64. If the preamplifier is working correctly, after 



8-60 




Model 3455A 



SERVICE GROUP C 



Section VIII 



lifting RS2 and R64, the other circuits are causing the malfunction (absolute amp, squaring amp, 
etc.). 

8-C-6 Absoivta AmplHiar Circuitry. 

8-C-7. If the waveshape at TPS appears to be incorrect, try the following checks (except where 
noted, the input signal should be a 10 V, 100 Hz sinewave). 

a. To check if other circuits on the A14 board causes failures in the absolute amplifier, the ab- 
solute amplifier can be isolated. This can be accomplished by lifting RS2 and R53. The amplifier 
should now be operating correctly. Troubleshoot the amplifier circuit, if defective. 

b. Check the power supply voltages at pins 4 and 7 of U7. Pin 4 should be approximately -IS V 
and pin 7 approximately + 15 V. 

c. Check for an approximately 2.8 V peak to peak sinewave at U4 pin 6. Troubleshoot U6 and 
associated circuitry, if necessary. 

d. If the sinewave at U4 pin 6 has oscillations, reduce C22 to 10 pF (part number in parts list). Do 
not reduce C22 below 10 pF, as the frequency response of the ac convertor may be affected. 

e. The cathode/anode junction of CR5 and CR4 should have a sinewave with slight distortion at 
the zero crossover point. Replace CR4 or CRS, if necessary. 

f. If the signal at TPS is distorted, CR4 may have leakage. CR4 and CRS can be interchanged. 

g. If QI4 or QIS appear defective, check with an ohmmeter and replace, if necessary. 



8-C-8. Squaring Amplifiar, Integrator, and Antilog Circuitry. 

8-C-9. The squaring amplifier, integrator, and antilog circuits are connected by feedback paths. 
Isolation of these circuits may be difficult. There are, however, some checks used to help 
troubleshoot these circuits (except where noted, the input signal should be a 10 V, 100 Hz sinewave). 

a. In some cases it is possible to isolate the integrator from the other circuits on the A15 board. 
This can be accomplished by shorting TP6 to the cathode of CR3. The reading at TPl should be ap- 
proximately zero. If there are great offsets at TPl. troubleshoot the integrator. 

b. Apply a 100 mV, 100 Hz sinewave to the input terminals of the 345SA. The instrument should 
be in the 10 V range and display approximately .10(X) V. Check for dc readings of + .82 V at TP4, -9 
V at TP3, -.48 V at TP2, and + .067 V at TPl. These readings may be helpful in isolating the squar- 
ing amp, integrator, and antilog circuits. 



c. Reapply a 10 V, 100 Hz sinewave to the input of the 34SSA. The instrument should be on the 10 
V range. Check for dc readings of approximately + .66 V at TP4, -1.15 V at TP3, -.6 V at TP2, and 
-I- 6.7 V at TPl. Again, these readings may be helpful in isolating the squaring amp, integrator, and 
antilog circuits. 

d. Check the power supply voltages of Ul, U2, and U3. Pins 7 of the op-amps should be approx- 
imately -I- 15 V and pins 4 should be approximately - IS V. 

e. Check for a voltage drop of approximately + 3.3 V across R36. If this voltage drop is incorrect, 
Q12 or Q13 and their associated circuitry may be defective. 

f. For parasitic oscillations at TP3 change R36 to 649 0 (part number: 0698-4460). 

g. If the display of the 3455A indicates an overload condition with a good waveshape at TPS, 



8-61 




Section VIll 



SERVICE GROUP C 



Model 3455A 



short Cl 3. The squaring amp circuit should now act like an emitter follower with a gain of one. Short 
the input of the 345SA and if the display indicates zero, Q9A or Q1 lA may be defective. If the instru- 
ment is still in overload, short the cathode of CR3 to TP6. If the overload condition disappears, the 
square root amp (U2 and associated circuits) or QllB may be defective. If the overload condition re- 
mains. troubleshoot the integrator (Ul and associated circuits). 

h. If Q9 or QM are replaced, R6 may need padding. With a 1 V, 100 Hz sinewave applies to the in- 
put of the 3455A, adjust RIS for a 1 V reading on the display. If RI7 is out of range, R6 needs pad- 
ding. If the reading is low, increase the value of R6. If the reading is high, decrease the value of R6. A 
change of 4 K ohms should change the reading about .5^t (padding list is in the parts list). 

8 C-10. AC/DC Qparation. 

8-C-l I . When dc coupling is used with an ac input signal, the specifications of the True RMS conver- 
tor become wider. Make sure the instrument meets specifications before troubleshooting the ac con- 
vertor in dc coupling. Some troubleshooting hints for the ac/dc operation are given below. 

a. Large differences between an ac and dc input signal with the 34S5A set for ac/dc operation; - 
Match the betas of Q9 and Qll. To further help the performance of the ac convertor in dc coupling, 
add C40 (2.2 capacitor, part number: 0160-0128). A short procedure for the addition of C40 is as 
follows. 

1. Remove CR3 and install pins into the eyelet holes where CR3 has been removed. 

2. Solder both CR3 and C40 to the pins. Make sure CR3 is mounted in the correct direction. 

b. Difficulty in balancing ac and dc input signals with the 3453A set for ac/dc operation: Try 
changing R5S. 

c. Large differences with the 34SSA set for ac and ac/dc operation: change R95 to 806 ohms (part 
number 0698-3557). 

8-C-l 2. AC Noisa (Sehamatic 31. 

8-C-13. Before checking for ac noise, verify that the dc readings are good. Troubleshooting for any 
dc noise must be done before troubleshooting for any ac noise. 

8-C-14. Most noise on the ac convertor board can be isolated into certain areas of the board. The 
following procedure may be used to isolate those areas. 

a. Apply a 10 V, 100 Hz sinewave to the input of the 34S5A. Set the instrument to the 10 V range 
in the ac normal function. 

b. With a DVM, measure the ac signal at TPS. It may also be possible to check the signal of TPS 
with an oscilloscope, if the noise is great enough. If the signal is noisy, troubleshoot the input and 
preamplifier circuits of the ac convertor. 

NOTE 

Someiimes it is possible to check noise at TPS with a D VM in the dc 
mode. The input of the 3455 A has to be shorted with the D VM connected 
to TPS. There should be very little deviation noted. 

c. With the 10 V, 100 Hz sinewave applied to the input terminals, measure the voltage at TP5 with 
a DVM in the ac mode. Again, it may be possible to measure the voltage with an oscilloscope. If the 
signal is noisy, troubleshoot the absolute amplifier circuits. 

NOTE 

It is also possible to check for noise at TP5 with a DVM in the dc mode. 



8-62 




Model 3455A 



SERVICE GROUP C 



Section VIII 



Again, ihe input of the 3455A should be shorted and very little deviation 
should be noted. 

d. Short the input of the 345SA and measure the dc voltage at TP3. If the voltage is very jumpy, 
troubleshoot the squaring amplifier circuits. 

e. Short the cathode of CR3 to TP6 and measure the voltage at TPl. This voltage may jump 
around a little more than at the other test points. If the voltage is extremely jumpy, troubleshoot the 
integrator circuit. If the voltage is relatively steady, the antilog or square root circuit may be noisy. 

8-C-lS. The above procedure (paragraph 8-C-14) should isolate most areas on the ac convertor 
board that may cause noise. A few other hints and checks, given below, may be helpful for specific 
noise. 

a. Noise on all ranges with the input shorted: Check for *2 mV to -3 mV at U2 pin 2. If the voltage 
is out of the correct range, it may cause a noisy zero indication. The padding resistor (R21) may have 
little or no effect in padding U2. This condition is usually caused by a leaky Q9B or CR2. Replace Q9 
or CR2, if necessary. 

b. Noisy when low frequency signal is applied to the 34S5A: The fast ac switching circuitry may 
be defective. The following checks can be made to troubleshoot this circuit. 

1. Apply a I V, 100 Hz signal to the input of the 34SSA, with the instrument set to the 1 V 
range and to the normal ac function. 

2. With an oscilloscope, check the signal at TPl. The signal should be approximately +6.7 
V dc, with no ripple, if the signal has ripple on it and the dc level is incorrect, perform the next 
step. 

3. Set the 34SSA to the fast ac function. Measure the voltage at the junction of R4 and RS 
and the gate levels of Q2 and Q8. The voltage should be approximately - IS V dc. Next, set the 
3455A to the normal ac function. The gate levels of Q2 and Q8 should be approximately zero, 
and the Junction of R4 and RS should be approximately + IS V dc. The gate levels of Q3 and 
Q4 should be complimentary to the gate levels of Q2 and Q8. 

c. Noisy in the fast ac mode: Check for a defective R9. 

d. Other noise: If the 30 V regulator (A10U36) is defective, it may cause bursts of RF with heat. 
This may show up as noise on all functions and ranges of the 34SSA. It would be, however, more 
noticeable in the ac function. 

8-C-16. Miscellaneous Troubleshooting (Schematic 3}. 

a. 10 kHz reading high: Check for the correct high frequency padding of R89. In order to obtain 
optimum accuracy over the entire frequency range of the 345SA, R89 should be padded approximate- 
ly 4000 counts high with a 1 V, 1 MHz input. Use the following procedure. 

1. The 34SSA should be turned on and warmed up for at least 1/2 hour. All shields and 
covers should be in place. 

2. Perform the RMS convertor adjustment in Section V of this manual. 

3. Apply a 1 V, 1 MHz sinewave to the input of the 3455A. Pad R89 for a reading approx- 
imately 4000 counts high. Check the accuracy of the ac convertor. 

b. General hints: Give iheac convertor board a good mechanical inspection. Make sure ail relays, 
op-amps, capacitors, and FETs are not touching the ground plane, shields, or each other. 

c. Reading above 100 V erratic: Check for relay cases touching the ground plane. 

d. Arcing at 1000 V ac: Check for capacitors touching the shield or ground plane. 



8-63 




Section Vlll 



SERVICE GROUP C 



Model 3455A 



e. Unable to adjust 100 V at 40 kHz, within limits: Moving the wire connecting the R92, C29, and 
C32, C34 modes away from the shield, may raise the reading. 

f. The 100 V and 1000 V ranges inaccurate: The R92 and R93 resistor divider may have changed 
value. K1 - K3 contacts may be resistive. 

g. Overload indication with a 1000 V at 1 kHz to 10 kHz sinewave applied to the input: AlOKl, 
K2, or KS may have developed leakage. The leakage can be isolated by removing the orange jumper 
from the froni/rear switch connected to K1 and KS. If the overload condition disappears, KI or K5 
may be defective. If the overload condition remains, remove the jumper from K2 and connect the 
jumper directly to the input of the AIS board. If the overload condition disappears, K2 may be defec- 
tive. 

h. 1 V and 10 V ranges inaccurate and out of calibration; A1SK3 may be shorted. 

i. Full scale readings go high with an increase in temperature: A1SQ9 or Ql 1 may be defective. 

j. 1500 counts error on the higher ac ranges: Connect guard to low. 

k. Differences in high frequency readings between the front and rear input terminals: Short the 
rear terminals’ guard to low. 

l. The ac convertor should be calibrated with the guard cover in place. 

8 C-17. Average Responding AC Convertor (Schematic 2). 

8-C-18. Due to the simplicity of the average responding ac convertors, only a few pertinent 
troubleshooting hints are given. 

a. Component location and layout may be critical to the convenor’s freqency response. 
Capacitors, especially in the input circuit, should not be too close or too far from (he PC board. 
Make sure (he relays are not touching the ground plane. 

b. The ac convertor should be calibrated with the inguard cover in place. 

c. A13Q15, U4, US, and associated circuitry may occasionally fail. 

d. To help flatten the frequency response of the convenor, especially at 10 kHz, C2S is usually 
padded with a 33 pF capacitor (pad list in the parts list). If unable to bring the level down at 10 kHz, a 
28 pF capacitor may be used. 

e. To help in troubleshooting the ac convertor, the following checks can be made. 

1 . Apply a I V, 100 Hz sinewave to the input of the 345SA, with the instrument set to the 1 V 
range. 

2. US pin 6 should have a 1 V peak to peak sinewave and TPl should have a S V peak to peak 
sinewave. 

3. A 6.67 V dc voltage should be read at TP2. If this voltage is good and there is an incorrect 
reading on the display, A10Q3 may not be turned on or may be defective. 



8-64 




Model 3455A 



Section Vlll 



SERVICE GROUP D 



8 0-1. OHM TRQUBlESHQOTtNG (SCHEMATIC 1. 4). 

6-0-2. Ohms Circuit Isolation. 

8-D-3. Before troubleshooting the ohms convertor, the 3455A should be operating correctly in thedc 
mode. Because some of the dc and Auto*Cal circuits are used in ohms, there circuits should be check- 
ed before working on any ohms circuit. The procedure below may be helpful in isolating the ohms 
section of the instrument. 

a. With the instrument set to the dc function, check the zero and full scale reading on the display. 
These checks should be made on all ranges (100 mV, I V, 10 V, 100 V, and 1000 V ranges). If any 
malfunctions occur, go to Service Croup B for further troubleshooting. 

b. Using the self-test mode of the instrument (see paragraph 8-B-3 for an explanation of the self- 
test), check for any Auto-Cal constant failure. Co to Service Croup B if any constants fail. 

c. If the dc readings on the instrument are good and the self-test passes, continue with this service 
group for ohms troubleshooting. 

8-D4. Ohms Servicing. 

8-D-S. The following checks may be useful if the ohms function is completely inoperative. 

a. Set the 3455A to the 2 wire ohms function, 1 K ohms range, and Auto-Cal off. 

b. With no load applied to the terminals of the 3455A, check the voltage across the input ter- 
minals. The voltage should be approximately -4.7 V dc (typically -4.5 V to 4.8 V). If the voltage is in- 
correct, the ohms convertor board (A12) or the input relays may be defective. Co to paragraph 8-D-6 
for further troubleshooting. 

c. When approximately -4.7 V is observed at the input terminals, the ohms convertor is in voltage 
limit. This is a correct indication with an open circuit input. Connect a 1 K ohm resistor across the in- 
put terminals of the 34SSA. Measure the voltage drop across the resistor. The voltage should be ap- 
proximately -.7 V dc and indicates correct constant current operation of the ohms convertor. Co to 
paragraph 8-D-6 if the voltage is incorrect. 

d. The above steps should isolate malfunctions in the current source circuitry of the ohms conver- 
tor. If all the steps indicate correct ohms operations, the miscellaneous troubleshooting section of 
this service group may be helpful (paragraph 8-D-8). 

8-D-6. Ohms Convertor Troubleshooting (Schematic 1, 4). 

8-D-7. Ohms convertor malfunctions may be caused by the ohms convertor board itself, or by the 
AlO mother board. It is important to remember that the mother board and ohms convertor have in- 
terconnecting ohms circuitry. Try the following procedure to troubleshoot ohms malfunctions. 

a. With a dc voltmeter, measure the voltage across A12C1. The low side of the meter should be 
connected to TP • V and the high side connected to the plus side of Cl . The meter should read -f 19 V 
dc. If the reading is low by .5 V or more, A12TI or AlOTI may be at fault. 

b. With an oscilloscope, measure the ripple across A12C1. The ripple should not be more than .1 
V peak to peak. If the ripple is too high, check AlOTl, A12TI, C3, CR4, or Cl. 

c. If the voltage across A12C! is very low or zero, look for an approximately 30 V peak to peak 
square wave at the anodes of CR3 and CR4. This signal should be around 31 MHz with the 345SA set 



8-65 




Section VIII 



SERVICE GROUP 0 



Model 3455A 



for 60 Hz line frequency. If (he signal is nonexistam, check for an approximately 3 V peak to peak 
signal at AI0U33 pins 9 and 12. If there is a signal at these pins, troubleshoot the circuit between the 
outputs of A10U33 and the secondary of A12T1. 

d. If there is no signal at AIOU33 pins 9 and 12, make sure the divider U31 and U33 are operating 
correctly. Also make sure U33 is enabled by line HI06. The inguard logic (Latch U12) may Im defec- 
tive. if the HI06 line is low. 

e. If all the above checks are good and the power supply voltages at A12TP - V and TP + V are 
good, the other ohms circuits may be defective. Troubleshoot the ohms circuits on the AlO mother 
board first. Make sure the correct relays and FETs are turned on. Troubleshoot the current amplifier 
circuit and the voltage clamp amplifier circuit or the ohms convertor board. 

8 0-8. Miieellaneout Ohms Troubleshooting Hints. 

a. Table 8-D-l may be helpful in troubleshooting various ohms malfunctions. The table gives 
various gain and reference resistor connections for ail the ohms ranges. 

b. 1 K range to 10 K range inoperative; Check for the correct operation of A10Q13. 

c. 100 K range to 10 M range inoperative: Check for (he correct operation A10QI4. 

d. 2 wire ohms and 4 wire ohms not zeroing properly and the reading changes 100 counts when the 
3455A is tapped; Check for a dirty front/rear switch. 

e. 10 K and 10 M ranges read low: Check AKXJ27, Q22, or U3. 

B-D-9. Ohffls Offsets. 

8-D-lO. The following information may be helpful in isolating ohms offsets. Again, make sure the 
3455A works correctly in dc. 

a. If there is a 150 counts to 200 counts offset on the 1 K ohm range, check A10K9. This relay 
should only be closed when the reference resistor is measured. If the 1 K ohm reading is low K9 may 
always be open. If (he reading is high, K9 may be shorted. 



Table 8-D-1. Ohms Gain and Switch Configuration. 



Range 


Ref 


Ref 


Unk Res 


1 


V 


V Unk 


Relays 


Unk Res 


In K Ohms 


Res 


Gain 


Gain 


(fs) 


Ref 


(fs) 


Closed 


forV L 


0.1 


1 K 


X10 


XI 00 


.7 mA 


0.7 


0.07 


K7, 8 


(> K) 


1 


1 K 


X10 


X10 


.7 mA 


0.7 


0.7 


K7, 8 


(> K) 


10 


1 K 


X20 


X2 


.5 mA 


0.5 


5 


K7, 8 


(> K) 


100 


1 M 


X2 


X20 


5 ^A 


0.5 


K8 


0 


(> 0) 


1 K 


1 M 


X10 


X10 


.7 ,iA 


0.7 


0.7 




{> Ml 


10 K 


1 M I 


X20 


X2 


5/xA 


0.5 


5 




(> Ml 


f»: denotes full-scale 




2 Wire Ohm: 


K2. K4 Closed 




VL: denotes Voltage Limited 




4 Wire Ohm: 


K3 Closed 







b. A quick offset check: Short either AI0R59 or R61 and observe the reading of the 3455A. If the 
offset disappears with RS9 shorted. A10Q13 and its associated circuitry may be leaky or defective. If 
the offset disappears with R6I shorted. AI0Q14 and its associated circuitry may be leaky or defec- 
tive. 



c. If there is an offset on the 1(X) K ohm range, remove the blue wire connected to A10R59. If the 
offset disappears, QI3 may be leaky. 



8-66 





Model 3455A 



SERVICE GROUP D 



Section VIII 



6-D-11. Ohms Noise (Schemitic 1, 4). 

8-D-I2. To prevent possible damage to sensitive components being measured, the ohms current 
source of the 3455 A is limited to 5 V. Lower currents are used to keep this voltage low. Because of the 
small currents, the ohms section of the instrument may be susceptible to noise. 

8-D-13. Before troubleshooting for any ohms noise, make sure the dc noise level is good. Check for 
noise on all dc ranges of the 3455A. If the dc operation is good, troubleshoot for ohms noise. A few 
troubleshooting hints for servicing ohms noise are given below: 

a. Excessive noise on all ranges: Check for a 19 V dc voltages across A12CI. If the voltage is low 
by .5 V, A12TI or AlOTl may be at fault. 

b. Readings decrease on each successive sample and then suddenly jump back, with the procedure 
repeating. The case of AIOR63 may be touching the case of Q37. 

c. Noise on the .1, 1, and 10 ranges: A10K9 may be defective. 

d. Possible noise on the 100, I K, and 10 K ranges with very high readings at 1/iO scale: A12CR7 
may be defective. 

e. 1/10 scale reading on the 100 K range is noisy and low: Check for oscillation at AI0TP4. This 
can be accomplished by setting the 3455A to the ohms function. The instrument should be on the 100 
K range, with Auto-Cal off, and placed in Hold/Manual. TP4 should be monitored with an 
oscilloscope. Press the HOLD/MANUAL button and observe for any oscillation at TP4. If any 
oscillation is noted, try changing A10C4 to .0068 (part number 0160-0159) and AlORl 1 to 1.3 K 
(part number 0757-0426). 

f. Noisy at I M and/or 10 M ranges: Push all wiring away from the ohms board and all input 
wiring away from the top guard cover, place the red wire, connected between the front/rear switch 
and the AlO board, next to the guard sheet metal. All wires should be kept away from transformers 
and transistors. 

g. 10 M range very noisy: Make sure the 50/60 Hz switch is in the correct position. 

h. Noise on the 1 K range: If noise shows up on older instruments, make sure on 18 guage teflon 
coated wire is installed in the instrument. The wire should be connected between pin E of A10J3 and 
the cardinal ground terminal located between K7 and K9. The wire may reduce noise on the 1 K ohms 
range as well as the I V ac and dc ranges. 

i. Noise in ohms function: To reduce external noise in ohms function, shielded cables are very 
useful. When measuring resistance in the 2 wire and 4 wire ohms function, connect the resistor to the 
3455A with one or more shielded cables. The shields should be connected to each low terminal. Most 
noise, associated with external body capacitance, should be shunted to ground rather than through 
the measuring instrumentation. The cables should not be reversed (the shields connected to the high 
terminals and the center conductor connected to the low terminals), or no shielded cables should be 
used. No shielded cables or reversed cables may cause excessive noise in ohms. 



8-67 




Section VIII 



Model 34S5A 



SERVICE GROUP E 



8 E-1. AID CONVERTOR AND INGUARD LOGIC TROUBLESHOOTING. 

8 E-2. AID Convertor Servicing ISchemetic 6, 7). 

8-E-3. Before troubleshooting the A/D circuits make sure the outguard section of the 3455A is 
operating correctly. Use the half-splitting method of paragraph 8-1 9S. The following procedures may 
be used to check the correct operation of the A/D circuits. 

a. Turn the 3455A off. and disconnect the AlOWI Inguard/Outguard Cable assembly from the 
outguard connector (A1J7). 

b. Remove the analog test jumper (from A10U27 pin 10), and connect test point A10TP9 to 
ground. 

c. Apply -10 V dc to the input terminals of the 34SSA and turn the instrument on. 

d. With an oscilloscope measure the waveform at AlOTPl. The waveform should look like 
top waveform in Figure 8-E-l. 

e. The correct waveform at TPl generally indicates correct A/D operation. If, however, the A/D 
waveform is good and the A/D circuit is still inoperative, go to paragraph 8-E-7 for troubleshooting. 




Figure 8 E-1. A/0 Waveforms. 



8-68 





Model 3455A 



SERVICE GROUP E 



Section Vlll 



f. For no A/D waveform at TPl, go to paragraph 8-E-4 for troubleshooting. For an incorrect 
waveform go to paragraph 8-E-6. 

8 E4. No A/D Wavoform. 

8-E-S. Since the A/D waveform is dependent on various circuits in the 3455 A (input, main amplifier, 
etc.), isolation of these circuits is necessary. The method used is simply a signal tracing method with 
limited operational checks. 

a. Set up the 3455A using the procedure of paragraph 8-E'3a, b, and c. 

b. Measure the voltage at the multiplex node (sources of AlOQI, Q2, Q3, and Q4). If the voltage is 
not -10 V dc, the input circuit may be inoperative. The multiplex node may also be loaded down by 
one or more FETs. 

c. Measure for a >10 V dc voltage at A10TP4. If the voltage is incorrect, troubleshoot the main 
amplifier circuit. Make sure A10Q19 is turned on. 

d. Measure the instrument's reference voltages. A10TP8 should be -f 10 V ± 100 and TP7 
should be • 10 V ± 20 mV. If the reference voltages are incorrect, troubleshoot the reference assembly 
(A 1 1 or A20) and/or U7. The reference voltages are used on the A/D board and should be correct for 
proper A/D operation. 

e. Short across capacitor A14C2 and measure the voltage at A14TP1. The voltage should be ap- 
proximately zero. If there are any great offsets, troubleshoot A14U3 and associated circuits. If the 
voltage at TPl is good, remove the short from C2 and continue with this procedure. 

f. Short AI4TP1 to ground and measure the 0 detect, 10 V detect, and .2 V detect levels. The table 
below gives the correct detect levels. Remove the short from TPl and apply -10 V to TPl. Measure 
the levels of the 0 detect, 10 V detect, and .2 V detect. See the table below for the correct levels. 





A14TP1 Shorted 


A14TP1 at -10 V 


0 Detect Level 


s 5 V 


s 0 V 


1 0 V Detect Level 


s 0 V 


s 5 V 


.2 V Detect Level 


s 0 V 


s 0 V 



If the levels in the table are incorrect, troubleshoot A14U4, 5, 6 and their associated circuits. 

g. Other circuits on the A/D board may affect A/D operation. These circuits are the input circuits 
and diode array U\ and #2 and their associated circuits. Also make sure A14Q3, Q4, and their 
associated circuits are operating correctly. If these circuits appear to be working correctly, the in- 
guard logic may be at fault. Go to paragraph 8-E-lO for further troubleshooting. 

8-E-6. Incorrect A/D Waveform. 

a. Check for a leaky AI4C2, Q5, U3, or U5 and associated circuits. Circuits past U4 may 
also be defective. 

b. Circuitry preceeding the integrator may also cause an incorrect A/D waveform. Make sure 
A14Q2, Q4, and their associated circuits are operating correctly. 

c. Check for correct operation of the detect circuitry. Paragraph 8-E-5f may be helpful in 
troubleshooting these circuits. 

B E-7. Correct A/D Waveform. 

a. If the A/D waveform is correct and the A/D board is still inoperative, check the zero detect cir- 
cuit. Make sure the zero detect signal is stable with the correct voltage levels (approximately 0 V or 5 
V). 



8-69 




Section VIII 



SERVICE GROUP E 



Model 3455A 



b. If the 0 detect signal of older instruments is unstable, modify the instrument in the following 
way: 



1. Change A I4R44 from a 10 M ohm resistor toa 2 M ohm resistor (part number 0683-20S5). 

2. Change A12R7, R8. R16, and R17 from 4.99 K to 10 K ohm (part number 0757-0442). 

c. Check for the correct operation of AI4US and its associated circuitry. Since U5-and its 
associated circuitry is an absolute amplitifer, the output of the amplifier (emitter of U6) should be the 
same as the signal at TPl. Therefore, pins 14 and 15 of the A 14 board should also show the absolute 
value of the signal at TPl. The correct signals for a -10 V input to the 3455A are shown in Figure 
8-E-l. If the signals at A14P1 pins 14, IS, and S are incorrect, troubleshoot the detect circuits. 

d. Make sure any oxidation layers have not formed on the pins of the AI4 board. The pins can be 
cleaned with a soft lead eraser. 

B-E-8. AID Noise (Schematic 6). 

8-E-9. A/D noise will usually show up in all ranges and ail functions of the 34S5A. Two circuits to 
check for noise on the A/D board are the integrator and the input circuits. 

a. Check for a noisy A14Q5 or U3. Make sure there are not oscillations present at TPl. 

b. Check for a stable zero detect signal at A14U6 pin 1. If the signal is unstable, U4 or U6 may be 
noisy. 

c. Check for a noisy AI4Q3. 

B-E-10. Inguard Logic Troubleshooting (Schematic 7). 

8-E-l 1. Before troubleshooting the inguard logic make sure the outguard logic is operating correctly. 
Use the half-splitting technique of paragraph 8-195. 

a. Check the back gate bias voltage (B.G.) of the processor (A10U26 pin 387). The voltage should 
be within ± .25 V of the voltage marked on the processor. If the voltage is incorrect, check for the 
correct value of pad resistor A10R105 (pad list in parts list). If the pad resistor is the correct value and 
the bias voltage is incorrect, replace the processor. 

8-E-12. Inguard Logic Troubleshooting with no AfO Waveform. 

a. The signals at A10U26 pins 34 to 37 should be the same as those on A3TP4 to TPl. The only ex- 
ception is the signal at A10U28 pin 9. If the signals do not agree, check for malfunctions in the in- 
guard light isolators. A10U34 and U35, plus their associated circuits. Line F0 and FI transfer data 
from outguard to inguard (F0 is the data transfer line and FI is the data transfer rate line). 

b. If pin 9 of AIOU28 is different than pin 37 of U26 and the HAZ line (pin 1 of U27) is low, the 
pulse transformer and/or associated circuits may be defective. This interrupt circuit can be checked 
by manually clocking A IOTP 10. and can be achieved by pulling TP 10 low and then releasing it. If no 
toggling is taking place, troubleshoot the interrupt circuit consisting of A10U32A and U27. If there is 
toggling, check T2 or the outguard section (Al). 

c. The interrupt request lines at pin 29 of A10U26 must be high. Troubleshoot the interrupt cir- 
cuitry if necessary. 

d. Data lines D0 to D7 (pin 18 to 35 of U26) and program address lines (PA0 to PA7 pins 1 to 8 of 
U26) should have voltage levels from approximately zero to approximately + 4.5 V. Check for any 
circuits causing these lines to be loaded down. It is possible and normal to observe sharp peaks of 3 V 
to 3.5 V on some lines of U26. These peaks are present when the line is in a tri-state mode. This is a 
possible and normal operation. 



8-70 




Model 3455A 



SERVICE GROUP E 



Section VIII 



Table 8-E-1. Mnemonic Definitions. 



P N 

Poliarity 

Indicator — J L 

(H = High True 
L = Low True) 

Function 

Indicator 



Specific Line 
Indicator 



Mneumonic 



HAC 

HAC1 

HAC2 

HADl 

HAD2 

HAD3 



High 

High 

High 

High 

High 

High 



HAZ 

HI01 

HI02 

HIP3 

HI04 

HI05 

HI06 



High 

High 

High 

High 

High 

High 

High 



Definilions 



True AC (AC Enable) 

True Auto Cal 1(100 V, 1 kV Auto-Cal Constant (Cal Constant 4. 5, 6, 711 
True Auto Cal 2 

True Analog DC 1 (.1 V, 1 V, 10 V Range and Ohms) 

True Analog DC 2 (100 V, 1 kV Range) 

True Analog DC 3 (1 k V Range) 

True A/D Zero (Enables or Resets A/D) 

True Input Ohms 1 (2 Wire Ohms Enable) 

True input Ohms 2 (Connects 4 Wire and Current Source) 

True Input Ohms 3 (Ohms Ref Low Measurement) 

True Input Ohms 4 (1 K Reference Resistor Select [with HI05]) 

True Input Ohms 5 (.7 WA Current Source Select) 

True Input Ohms 6 (Ohms Current Source Enable) 



HMA1 

HMC1 

HMC2 

HMC3 

HMC4 

HMD1 

HMD2 



High Measure AC 1 (Output from AC Converter Measured) 

High True Measure Constant 1 (Measures Ohms, .1 V and 1 V Offsets [Cal 
Constant 2, 3, 8, 9, 1 1 j) 

High True Measure Constant 2 (Measures 10 V Gain [Cal Constant 10)) 

High True Measure Constant 3 (1 kV Range Enable [Cal Constant 0, 1, 6)1 
High True Measure Constant 4 (Measures 1 V Gain [Cal Constant 0}) 

High True Measure DC 1 (100 V Rangel 

High True Measure DC 2 (.1 V 1 V, 10 V Range and Measure & Unk) 



HM01 

HM02 

HPD1 

HPD2 

HPD3 

HP01 

HPRF 

HPRS 

HR12 

HR24 

HR34 

LACF 

LAC3 

LAC 5 
LNRF 
LNRS 
LVIN 



High True Measure Ohms 1 (Measure Ohms Ref, Range 100 K. 1 M, 10 M) 
High True Measure Ohms 2 (Measure Ohms Ref, Range .1 K, 1 K 10 K| 

High True Pre-Amp DC 1 (x 20 and x 100 Gain) 

High True Pre-Amp DC 2 (x 1 Gain) 

High True Pre-Amp DC 3 (x 10 Gain) 

High True Pre-Amp Output (x 2 and x 20 Gain) 

High True Positive Rundown Fast (For Negative Input Voltage) 

High True Positive Rundown Slow (For Negative Input Voltage) 

High True Range 1 2 (Sets AC Converter Range 1,10) 

High True Range 24 (Sets AC Contertor Range 10, 100) 

High True Range 34 (Sets AC Converter Range 100, 1000) 

Low True AC Fast (AC Fast Enable) 

Low True Auto Cal 3 (100 V, 1 kV Auto-Cal Constants [Cal Constant 4, 5, 6, 
71) 

Low True Auto-Cal (1 kV Range and 1 k^, 1 V Offset [Cal Constant 1 . 6|) 
Low True Negative Rundown Fast (For A/D Positive Input Voltage) 

Low True Negative Rundown Slow (For A/0 Positive Input Voltage) 

Low True Voltage Input (Enables A/D Input) 



e. The clear line of A10U15 pin I should have an approximately + 5 V level. Troubleshoot U9. 
UI9, and their associated circuits. 



8-71 




Section VIII 



SEBVICE GROUP E 



Model 34S5A 



f. Check for a dock signal at A10UI5 pin 9. If the signal appears to be good, the processor (U26) 
and/or the ROM (U2S) may be defective. If the clock signal is missing, check for 500 nano second 
pulses at the device select lines of U26 (pins 12 to 15). If the pulses are good, U14 may be at fault. 

8-E-13. Inguard logic Troublashooting with an A/D Wavaform. 

a. Check the light isolators and associated circuits as explained in paragraph 8-E-12a. 

b. Check for a defective A10U26. 

c. Check for an open A10CR41 and CR42. These diodes may cause glitches on U26pin 29, causing 
the processor to be interrupted continuously. 



8-72 




Model 3455A 



Section VIII 



SERVICE GROUP F 



8 F-1. OUTGUARD LOGIC TROUBLESKOOTING (SCHEMATIC 8. 9. 10). 

8-F-2. Outguard logic troubleshooting should be done using the Signature Analysis Routines (SA) in 
Figures 8-H-20 to 8-H-27. If any incorrect signatures are observed, the following checks may be 
helpful. 

a. If any incorrect signatures are observed check for a I ^F capacitor across AIU49. Install one if 
missing (part number 0180-0291). The capacitor should be installed to the underside of the A1 
motherboard, with the + terminal to pin 14 of U49 and the • terminal to pin 7 of U49. 

b. If no stable signature can be located and the A3 board has been replaced, check the IC signals. 
Make sure they are toggling with good logic highs and lows (approximately 4 V peak to peak). 

c. Check for the waveform shown below at the junction of A1C29 and R42. If this signal is miss- 
ing, C29 may be defective. U48 may also cause the missing signal. 

2 V 

I V 

(4—3 1.4 msec- 

O V. 

8 F-3. Main Controller Troubleshooting (Schematic 8). 

a. Data lines D0 to D7 (pins 1 8 to 25 of U3U9) and program address lines P A0 to PA9 (pins 1 to 8 
of U9) should have voltage levels approximately + 4.5 V peak to peak. Check for any circuits that 
may cause loading. 

b. Sharp peaks of 3 V to 3.5 V may be observed on some lines of the processor (A3U9). This is 
normal. The peaks are present when the processor is in a tri state mode. 

c. Check the back gate bias voltage (G.B.) of the outguard processor (A3U9). If the voltage is dif- 
ferent from the voltage marked on the processor (by ± .35 V) check for the correct value of the pad- 
ding resistor A3R3. If R3 is the correct value and the bias is incorrect, replace the A3 board. The cor- 
rect value of R3 is listed in the following table. 




G.B. 


A3R3 


•hp- Part No. 


•5.0 V 


4.64 kO 


0698-3155 


-4.5 V 


2.87 kn 


0698-4436 


-4.0 V 


1.96 kR 


0698-0083 


-3.5 V 


1 .00 kO 


0757-0280 


•2.5 V 


715 n 


0698-3700 



8 F-4. Front Ponol Troubleshoot 



ng. 



8-F-5. Front Panel Oporotion Check. 



a. Turn the 3455A off. Place the instrument in the SA mode by disconnecting the test jumper on 
the A3 board and disconnect the plug from A1J7. 



b. Turn the 3455A on. Half of the instruments from panel LEDs should alternately turn on and 
off with the other half. 



c. At the time the instrument is turned on and half the front panel LEDs turn on, a 0 should be in- 
dicated on the left side of the display. The 0 should move one position to the right each time the LEDs 
change. When the 0 reaches the far right of the display, a .0 will start at the left and move to the right. 



8-73 




Section VIII 



SERVICE GROUP F 



Model 3455A 



d. The same operation takes place for 1, .1. 2. .2, 3, .3. after the .0 has moved to the far right of 
the display. If any of the LEE>s do not light, replace them or troubleshoot their drive circuits. If some 
numbers of the display are bad, troubleshoot the display and associated drive circuits. 

8-F-B. Front Panol Servieino (Schomotic 10). 

a. If the display blanks out any zeroes, try replacing AIU62. 

b. The proper operation of the front panel buttons can be checked by monitoring A1U5^ pin 14. 
The level at pin 14 should go low (TTL) low, any time a front panel button is pressed. If this is not 
observed, try replacing U57. 

c. If the front panel buttons do not operate, check for a high level (TTL high) at A1 J8 pins 2 and 

3. A high level at any of these pins will disable some of the front panel buttons. Check for the correct 
operation of AlUSl, U50, or US3. 

d. If the front panel has a sticky switch, try the following: With a low temperature soldering iron, 
heat the solder connection of the LED within the switch. While the solder is warm, push the button in 
and out several times. This should straighten out the LED and relieve any pressure on the switch. 



e. If the procedure in the precendent paragraph does not relieve sticky switches, change LEDs 
A2CR5 to CRl 1, CR19 to CR22, and CR24 to CR35 from -hp- part numlKt 099(W)547 to -hp- part 
number 1990-0665. These changes should be made for instruments with serial number I622A0I336 
and below. A procedure for changing or replacing LED’s are in paragraph 8-F-7. 

f. A modification to reduce key bounce is as follows: Change A1U57 from a 9318 to 98L18 (part 
number: 1820-0987), A2R17 and R18 from a 2.2 K ohm resistor pak to a 10 K ohm resistor pak (part 
number; 1810-0206). This change should be made for instruments with serial number 1622A00906 
and below. 



NOTE 

Switch bounce can be observed by pressing the ENTER Z button and 
then pressing the MA TH OFF button only once. If two 2 'j are displayed, 
the 2455A has key bounce. 

g. For all other front panel malfunctions use Troubleshooting Diagram 8-H-26. 



B-F-7. Front Panel LEO'a Switch, and Kay Cap Replacement Procedure, 
a. Removal Procedure. 

1. Remove front frame which is held by 8 screws. 

2. Disconnect two connectors between front panel and left side of instrument. 

3. Remove front panel and ON/OFF switch. 

4. Remove II screws holding Display/Swiich board to front panel and remove Display/- 
Switch (D/S) board. 

5. Pull key cap off switch body. 

6. With knife or punch, cut off or punch through the red switch body mounting studs (clean 
excess plastic off to prepare holes for new switch). 

7. Hold display board upside down with key facing down and heat LED terminals to let bad 
LED fall out. 

8. Suck out solder holes to prepare for new LED. 

8-74 




Model 3455A 



SERVICE GROUP F 



Section VIII 



b. Replacement Procedure. 

1 . Mount the switch body on the D/S board and be sure the body is aligned with the other 
switches (NOTE: very important as the switch may bind if it is not straight). 

2. Using a medium temperature, broad, tip soldering iron or woodburning tool, carefully 
melt the plastic studs down into a little dome to secure the switch body. 

3. Insert LED with shorter leg toward top of board. Make sure LED is flush with the board. 

4. Replace key cap. 

5. Depress key all the way to seat LED in place, and then solder LED using a minimum of 
solder. 

6. Hold D/S board so keys point up and reheat LED terminals to allow solder to flow away 
from switch. 

7. Depress key several times to make sure key does not stick, if it sticks, repeat (6). 

8. Remount D/S board on front panel frame. 

9. Plug both connectors back into main board. 

10. Remount front panel to chassis. 

1 1 . Replace ON/OFF switch. 

NOTE 

Remember to try steps (6) and (7) of "’Replace" before replacing switch; 
it could save time. It is important to use a low or medium temperature tip 
soldering iron, as exposure to SOO^F for over S seconds could damage the 
LED’s. 

8-F-B. HP-IB Troubleshooting (Schematic 9). 

8-D-9. Before troubleshooting the HP-IB section of the 3455A, verify that the 3455A is malfunction- 
ing and make sure the “problem” is not due to externa] programming (see Section III of this 
manual). 

a. If incorrect data is sent over the HP-IB lines, make sure the data is different than what is 
displayed on the front panel. If the data is the same, the instrument’s HP-IB Section is not at fault. 

b. Check for a bad connection between the instrument's HP-IB connector (J3) and the connector 
of the HP-IB cable. Clean both connectors, if necessary. Use a good freon based contact cleaner. 
Also, make sure the HP-IB cable external to the instrument is good. 

c. Use the HP-IB SA Troubleshooting Diagram (Figure 8-H-27) for most of the HP-IB Section of 
the 34SSA. SA can check most of this section, except for the HP-IB lines themselves. Use the S9401A 
Bus System Analyzer for these lines. 

d. Check decoders AIU19, U20, or UIl. 



8-75 




Section VIII 



Model 3455A 



SERVICE GROUP G 



8-61. MISCELLANEOUS TROUBLESHOOTING. 

8-G-2. Powar Supplin ISchsmatic It). 

a. In many of the 345SA's power supplies, the voltage reference of one supply is the output of 
another. This arrangement ties the voltages of the two supplies together. A shift in one supply is 
reflected in the other supply. 

b. To isolate dependent supply circuits, the reference supplies should be separate from each other 
and from the circuits they supply. The following steps may be used. 

1 . Use external supplies to provide a reference to dependent supplies. 

2. Use external supplies to drive circuits in place of internal supplies. 

c. Following are some voltages of the inguard power supplies. 

1. Main power supply voltages. 

AlOTPll: +9 V to +11 V 
A10TPI2: + 19.5 V to +23.5 V 
A10TP13: -19.5 V to -23.5 V 
A10TP14: +38 V to +44 V 
A10TP15: -38 V to -44 V 

AIOTP + 9: + 8.1 V to + 9.9 V (Inguard processor must be installed). 

2. Ohms supply voltages 

AlOTl pins 1 and 3: 10 V rms (20 V peak to peak) square wave. 

AlOTl and AI2T1 connection: .2 V rms (.25 V open circuit) square wave. 

A12T1 pins 1 and 3: 40 V rms (80 V peak to peak) square wave. 

3. Allowable noise on the ohms supply as measured with a true rms voltmeter. 

+ 6.2 V supply: 30 <iV noise 
-6.2 V supply: 60 /iV noise 

d. If the fuse of the 3455A keeps opening, check the AlO board power supply breakdown diodes 
(A10CR64, 66, etc.). Also, make sure the 3455A has been switched to the correct line voltage. 

e. Table 8-C-l lists the various components and assemblies which uses the individual power sup- 
plies. This table may be useful if a power supply is loaded down by a defective component or 
assembly. 



Table B G-1. Power Supplies Locetions. 





1 lu ( M nr 

1 1 « S » T 1 9 M 11 1) 14 la la If :a 86 n 21 II M hi » 


A D «e< AC 


2 5 a t «a 


• iOi, 


X X . 


, 




• 2R 3V 




V 




• 18 V 


a 


A * 


a 


■iv 


* 








x*A«#»* 


1 


■ a 






“T 




IS V 


1 


t X t 






• 







8 G-3. Reference Assembly (Schematic 5). 

a. The reference assembly of the 3455A is on the exchange program and should be returned to the 



8-76 




Model 3455A 



SERVICE GROUP G 



Section VIII 



nearest -hp- Service Office, if inoperative. The only checks that can be made are the following. 

1. If the reading on the display jumps 10 or 100 counts when adjusting any adjustments on 
the reference assembly, the wiper of the pot may be dirty. Work the adjustment screw of pot 
back and forth to clean the wiper. 

2. Make sure an oxidation layer has not formed on any pins of the assembly printed circuit 
board. The pins can be cleaned with a soft lead eraser. 

3. Typically, the maximum noise allowed on the reference voltages (use a DVM with input Z 
> 1010) are 20#tV for the + 10 V reference and 30 /tV for the -10 V reference. Replace 
the assembly if excessive noise is present. 

4. The + 10 V reference voltage at A10TP8 should be adjustable to -f 10 V ± 
100 fiV and the -10 V to -10 V +20 mV. Replace the assembly if both the + 10 V and 
-10 V are not adjustable. Replace A10U7 if only the -10 V reference is incorrect. 

8-G-4. Turn-Over Errors (Schematic 1, S, and B). 

8-G-S. Turn-over errors are present when, for example, a positive input reading is good and the 
negative input reading is out of tolerance. This can be checked by taking a positive reading and then 
reversing the input leads. The following are a few turn-over checks and hints. 

a. When checking for turn-over errors, the 10 V range and zero offsets should be the first things to 
check. 

b. Check the A/D converter (A14) if turn-over differences arc observed. Replace, if necessary. 

c. Turn-over errors on all ranges: Unsolder CRl and CR2 from the AlO board. If 
the error disappears, CRl and/or CR2 may be leaky. Make sure the + 10 V and -10 V 
references are good (A10TP8 should be + 10 V ± 100 /»V and A10TP7 should be -10 V 
± 20 mV). 

d. Turn-over differences on the 10 V range: Check AlOUl, U2, Q7, or QI8. Other 
possible causes may be Kl, Al, Q2, Q4, Q19, and their associated circuits. 

e. Turn-over errors on the top three ranges: Check A10K6 and QIS. 

f. Turn-over differences on the l(X) V and KXX) V ranges: Lift A10Q9 and CR29. If the error 
disappears, CR31 and/or CR29 may be leaky. Do the same with CR16 and CR17. Q8 may also be 
defective. 

g. The FETs connected to A10TP2 may cause turn-over errors, if leaky. (^40 may also be leaky. 

h. If the negative readings are good and all positive readings above 20 V are unstable on the 100 V 
range, check AI0Q36. 

B-G-6. Othar Troubleshooting (Schematic B and 111. 

a. If the instrument fails to sample in the dc volt, high resolution mode and the ac volt normal 
resolution mode, check A1C29 or U48. 

b. If the HP-IB operation is intermittent with the instrument’s LED’s dim, make sure the 50/60 
Hz switch is in the correct position. 

c. If the fan refuses to spin after repeated turn-ons, change AIRIS, 19, and 24 from 11.8 kll to 
13.3 kll (0757-0289). This change should not be made on operating fan circuits. 

d. A good fan measures approximately 30 (1 between the brown and yellow wires of the fan. A 
defective fan will usually measure between 10 (1 and IS Q. 



8-77 




Section VIII 



Model 34S5A 



SERVICE GROUP H 



B H-1. TROUBLESHOOTING DIAGRAMS. 

8-H-2. The following diagrams in this service group may be used to troubleshoot the 34SSA in place 
of the other service groups. These diagrams are separated into three groups. The first group is a 
General Troubleshooting Diagram which can be used to isolate the two main sections of (he instru- 
ment (Inguard and Ouiguard). The second group deals with the Inguard section and the third group 
can be used for Outguard Troubleshooting. 

8-H-3. General Troubleshooting Diagram. 

8-H-4. The General Troubleshooting Diagram (Figure 8-H-2) may be used in place of the Half- 
Splitting Technique of paragraph 8-196. Since this method is not as complete as the Half-Splitting 
Technique, use it only if an extra 34SSA or if an Inguard/Outguard Service Cable is not available. 



8-78 




Figure 8-H-1. Assembly and Test Point Locations. 





Turn Instrument ON. Press 
The Front Panel TEST 
Button. 



Proper Operation Of The TEST 
Function Is Indicated Bv The 
Front Panel Going Blank For A 
Few Secotvfs And Then All From 
Panel Enunciators (Except REAi^ 
TERMINAL) Being Lit And A 
Display of + 8888888 With A'l 
Decimals Lit Or If A Failure Is 
Detected By The TEST Routine. 
A Number. From 0 To 1 3 Will Be 
Displayed. 



YES 






The Proper Operation Of The 
TEST Function Indicates That 
The Majority Of The Inguard And 
Outguard Logic Is Functioning 
Properly. The TEST Function 
Does Not Check The Following 
Circuits: AC Converter, Ohms 
Converter, Front Panel Switching, 
HP-IB Interface, And Some Of 
The Input Switching Circuits On 
The AID Assembly. Refer To The 
HP-IB Section Of The Outguard 
Troubleshooting Procedure For 
HP-iB Problems. Refer To The 
Schematics And Theory of Opera- 
tion For Troubleshooting The 
Other Circuitry. 





YES 



A Failure Code Indicates That One Or 
More Of The Auto-Cal Constants Is Out 
Of Test Limits. 



Record Number Displayed 




1 



Turn The Instrument OFF. 
Disconnect The Test 
Jumper On the A3 Assem- 
bly And The Connector 
From A1J7. Turn The 
Instrument ON, 



Proper Operation Of The Out- 
guard Test Routine Is Indicated 
By A Number or Character Being 
Strobed Across The Display And 
The Enurtciators Being Alter- 
nately Lit, 



Go To Outguard Trouble- 
ahootlng Section Or Ap- 
propriate Service Group 
(See Paragraph 6-198). 




The Numbers Recorded Indicate 
Which Tests Have Failed. Use The 
Front Panel TEST Troubleshoot- 
ing Information Portion Of The 
Inguard Troubleshooting Section, 
Along With The Schematics To 
Troubleshoot The Inguard 
Switching. 



Go To Inguard/Outguard 
Transfer Circuitry Trouble- 
shooting Procedure Figure 
8-H-17 Or Appropriate 
Service Group (See Para- 
graph 8-1 98). 

3455-B-ll 



Figure 8-H-2. General Troubleshooting Procedure Diagram. 

8-79 









DISCONNECT PLUG 
FROM J7 FOB TEST, 




79HI {START STOP AT A3TP4I 



A10. Compor>«fli Locator Table. 



CeinMywni 


Col 




Cel 


Cemponeni 


C0< 


Comeonfdi 


Coi 


ConipoAtnt 


Col 


CemeoAoAt 


Col 


Cl 


6 


CB1-3 


6 


Jt 


c.o 


Ot 6 


C 


R1 


A 


SI 


A 


2-3 


c 


3.6 


D 


2 


C.F 


6 


D 


2 


6 






4 


D 


6 


E 


3 


A 


79. 11 


E 


34 


c 


T1 


6 




E 


7.8 


f 


4 


ac 


■} 


P 


79. 11 


D 


2 


F 


7 9, II 


F 


9. n 


B 


s 


E 


13 16 


c 


12 19 


6 


U14 


0 


12 


6 


>2-13 


D 






>7. 18 


C D 


21-27 


F 


66 


6 


1319 


c 


14 


t 






19. 21 22 


0 


26 29.31 37 


B 


7 


F 


19 


0 


IS 


F 






23 29 


E 


36 


C 


B 


C 


U 


A 


ten 


B 


jMI 2 


P 


31-32 


F 


39. 4144 


0 


9 


0 


19-19 


€ 


>8 19. 21. 23 


C 


3 


0 


3338 


8 


46 


E 


11 


c 


2’«22 


A 


23 


F 






37 39 


A 


46 


F 


1213 


0 


23-26 


6 


?4 


6 


K1 2 


A 


4041 


B 


47 


6 


14 16 


f 


29 27 


c 


2S26 


C 


a 


6 


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Model 34SSA 



SERVICE GROUP H 



Section VIII 



8-H-4. Inguard Trsublathooting Diagram. 

8-H-5. The following diagrams in this group can be used to troubleshoot the Inguard section of the 
3455A. A troubleshooting procedure for the Inguard/Outguard Transfer Cifcuitry is also included. 



8-81/8-82 




■^The Signal^ 
Levels > 4 V 
Peak-To-Peak 
' . ? / 



Replace Or Troubletfiool 
The A/0 Converter 1A14 
Assecnblyl. The Problem It 
Mott Likely In The Sv>litch- 
ing Circuits (A14U1. U2, 
Q3. 04 Artd Associated 
Co mponents. 



The Device 
Select Signal 
At A10UI5 
Pin 9 >4 V 
Peek-To-Peek?. 



Troubleshoot The Iriguard 
Logic Circuit (AtOU15. 
U22. U26 And Associated 
Components.) 



Troubleshoot The Device 
Select Circuit IA10U14. 
(J26 Artd Associated Com- 
ponents). 



3455 - 0-1 



rt 8-H-3. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 13. 



8-83/8*84 










3455-6-2 



Figure 8-H-4. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 12. 



8-85/8-86 














Troubleshoot The Device 
Select Circuit (A10U12. 
U14. U26 And Associated 
Components). 




Troubleshoot The Device 
Select Circuit IA10U16, 
U14, U26 And Assocleted 
Components). 



Figure 8-H-5. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 1 1 . 



3455-8-3 



8-87/8-88 















Auto-Ca] Circuitry TEST 10. 



8-89/8-90 













3455-0-5 



Figure 8-H-7. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 9. 



8-91/8-92 


























Figure 8-H-8. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 8. 



8 - 93 / 8-94 


















( Start ) 



I 



With A 


Display 


Reading 


0( "V 


(Test 7 


Failure), 


, Measure The Switch Drive 


Voltage 

A10U4. 


On Pin 


14 Of 




Troubleshoot The Device 




Troubleshoot The Device 


Select Circuit IA10U13, 




Select Circuit (A10UI2, 


U14, U26 And Associ- 




U14, U26 And Associ- 


ated Components). 




ated Components). 




Troulilcshool The Logic 


The Device Select^. 


Troubleshoot The Logic 


Circuit (A10U13, U22, 


I Sicnal At Pin 9 Of I'Ab ^ 


Circuit (A10U12, U22, 


U26 And Associated Com- 


1 A10U12>4V 1 


U26 And Associated Com- 


ponents). 


^\Peak -To -Peak^^ 


ponents). 



Troubleshoot The Device 




Troubleshoot The Device 


Select Circuit (A10U13. 




Select Circuit (A10U16, 


U14, U26 And Associated 




U14, U26 And Associ- 






ated Components). 



3455 -D-5 



Figure 8-H-9. Inguard Troubleshooting Procedure Diagram, 
Auto-CaJ Circuitry TEST 7. 



8-95/8-96 




















Start 



With A Diaplav Reading Of 
'’6" (Test 6 Failure), Mea- 
sure The Switch Drive 
Voltage On Pin 14 Of 
A10U4. 




is 


N. 




Is 'N. 


^ The Switch Dri' 

kJ A • Oir> 1 r 


e^ 

4 


>YES 


The Switch Drive ^N^YES f” 


L A10U24 Appro 


iX . 


J 


^ AlOUSApprcx. ^ ^ 



Check A10U4 And Associ- 
ated Components. 




Troubleshoot The 


Logic 


Circuit (A10U13, 


U22, 


U26 And Associated Com* 


ponentsl. 






Check A10U6 And Associ- 
ated Components. 



Troubleshoot The Device ! 
Select Circuit {A10UI3, ' 
U14, U26 And Assooi- ' 

ated Components). | 


1 ▼ 




Troubleshoot The Device 
Select Circuit (A10U12, 
U14, U26 And Associ- 

ated Components). 





Troubleshoot The Logic 


Device Select^s,,^ 


Troubleshoot The Logic 


^un'The 0 Sl!lec^S,. 


Troubleshoot The Logic 


Circuit (A10U16, U22, 


1 Signal At Pin 9 Of 


Circuit (A10U16, U22, 


^^Sional n 9 Of |YES 


Circuit (A10U16, U22, 


U26 And Associated Com- 


L A10U16 >4 V J 


U26 And Associated Com- 


L AlOl -4V J * 


U26 And Associaiied Com- 


ponenis). 


-To •Peak^^^.x'''*^ 


poncnts), 


\s^eal ’eok/'^ 


ponents). 



NO 




Troubleshoot The Device 
Select Circuit (A10U16, 
U14, U26 And Associated 
Components). 




Troubleshoot The Device 
Select Circuit IA10U16, 
U14, U26 And Associated 
Components). 




Troubleshoot The Device 
Select Circuit (A10U16, 
U14, U26 And Associ- 
ated Components). 



3455-D-7 



Figure 8-H-lO. Inguard Troubleshooting Procedure Diagram, 
Aulo-Cal Circuitry TEST 6. 



8 - 97 / 8-98 
























Auto-Cal Circuitry TEST 5. 



8-99/8-100 




















With A Display Reading Of 
•4'' (Test 4 Failure), Mea- 
sure The Switch Drive 
Voltage On Pin 14 Of 
A10U4. 



Check A10U9 And Assoc- 
iated Components. 





Check A10U5 And Associ- 
ated Components. 



Troubleshoot The Gate 






Troubleshoot The Gate 


Bias Amplitier Circuit 






Bias Ampliliei Cucuit 


(A10U1. OB And Associ- 






(A10U1, QB And Associ- 


ated Components). 






ated Components). 




1 


' 

V 




Troubleshoot The Logic 


^XThe Device Seleci\,^ 


Troubleshoot The Logic 


Circuit (A10U13. U22. 


^^Signa^t Pi n 9 Of ^ES ^ 


Circuit (A10U16. U22, 


U2€ And Associated Com- 


1 A10U16>4V • 


U26 And Associated Com- 


poncnts). 


^sPeak-To-Peak/'''^ 


ponents). 



3455-D-a 



Troubleshoot The Device 
Select Circuit <A10U13. 
U14. U2€ And Associ- 

ated Components). 



NO 



Troubleshoot The Device 
Select Circuit (A10U16. 
U14. U26 And Associ- 
I aied Components). 



Figure 8-H-I2. inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 4. 



8 - 101 / 8-102 






















Troubleshoot The Device 
Select Circuit (A10U13, 
U14, U26 Ar>d Associated 
Components). 




Troubleshoot The Device 
Select Circuit (A10U16. 
U14, U26 And Associ- 

ated Components). 




Troubleshoot The Device 
Select Circuit (A10U16. 
U14, U26 Artd Associated 
Components). 



345S-0-8 



Figure 8-H-13. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 3. 



8-103/8-104 























Troubleshoot The Device 
Select Circuit <AiOU16. 
U14. U26 ArKt Associ- 
ated Components). 



3455 -B -9 



Figure 8-H-14. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 2. 



8-105/8-106 














Stare 



With A Display Reading 
Of "1" (Test J Failure) 
Measure The Switch Drive 
Voltage On Pin 1 01 

A10U4. 



'■'’’"'The Drive 
Voltage Approx. 
\ OVdc? ^ 



The Switch Drive 
Voltage At Pin 1 Of 
A10U6 Approx, 
\ (JVdc? / 



The Switch Drive 
Voltege At Pin 2 Of 
A10U8 Approx. 
\ 0Vde? / 



The Switch Drive 
Voltage At Pin 14 01 
A10U5 Approx. 
\ 0 Vdc? 



Check Switching 


FET's 


J A10016, 021. 036. 038 


And Associated 


Com- 


ponents. 





The Driver Input 
Voltage At Pin 7 
Of A10U4 >4 V dc 
\ 



^ Is 
The Voltage 
At A10TP1 
Approx. 0 V dc 



Check A10U4 And Associ- 
ated Components. 



The Driver Input 
Voltage At Pin 7 Of 
A10U6>4Vdc 
\ / 



The Gate Bias 
Voltage At A10TP3 
Approx. 0 V dc 
\ / 





Check A10U6 And AssocI- 


J ^ 


ated Components, 



The Driver Input 
Voltage At Pin 4 
01 A10U8 Approx. 
\ OVdc? / 



Check A10U8 And Associ- 
ated Components. 



The Driver Input 
Voltage At Pin 9 Of 
A10U5 >4 V dc 
\ / 



The Gate Bias 
Voltage At A10TP3 
Approx. 0 V dc 

\ 7 ^ 



Check A10U6 And Associ- 
ated Components. 



Troubleshoot The Attenu- 
ator Circuit <A10U18, 
037, 035, 038, 039 , 040 
and Associated Com- 

ponents!. 



The Device Select 
Signal At Pin 9 Of 
A10UI3>4 V 
's.^.^ak -To -Realty 



Troubleshoot The 


Logic 


Ctrcuil (A10013, 


022, 


1 U26 And Associati^d Com* 1 


ponents). 


1 



Ti iiubleshooi The Gate 
6iis Amplifier Circuit 
l/llOUl, Q5 And Associ- 
31 td Components!. 



The Device Select 
Signal At Pin 9 Of 
A10U16 > 4 V 
Peak-To-Peak - 
\ 



T aubleshoot The 


Logic 


Creuit (A10016, 


022, 


T And Associated Com* 


1 pinents). 


1 



The Device Select 
Signel At Pin 9 Of 
A10U21 >4V 
w Peak-To-Peak - 
\ ? / 



Troubleshoot The Device 
Select Circuit (A10U21, 
U14, U26 And Associ- 

ated Components). 



Troubieshoot The Logic 
Circuit IA10U21. U22, 

026 And Associated Com- 
ponents). 



The Device Select 
Signal At Pin 9 Of 
A10U16 >4 V 
s._^^ak-To-Peak^ 



Troubleshoot The Gate 
Bias Amplifier Circuit 
(A10U1, Q5 And Associ- 
ated Components). 



YE^ 


Troubleshoot The 
Circuit (A10016, 


Logic 

022. 




U26 And Associated 
ponents^ 


Com* 



Troubleshoot The Device 
Select Circuit IA10U13, 
U14, U26 And Associated 
Components). 




Troubleshoot The Device 
Select Circuit (A10U16, 
U14, U26 And Associated 
Components!. 




Troubleshoot The Device 
Select Circuit 1A10U12, 
014. U2S And Associated 
Co mponentsl. 




Figure 8-H-15. Inguard Troubleshooting Procedure Diagram, 
Auto-Cal Circuitry TEST 1. 



3455-D-lO 



8-107/8-108 

























Start 



With A Display Reading Of 
(3 " (Test 0 Failure), Mea- 
sure The Switch Drive 
Voltage On Pin 14 Of 
A10U9. 



i i 



is 



Is 



The Switch Drive 
Voltage At Pin 1 Of 
A10U4 Approx. 
\ QVdc? ^ 



The Drive 
Voltage Approx. 
^ -HO V dc? 



YES 



YES 



NO 



NO 



Is 



Is 



Is 



Is 



The Driver Input 
Voltage At Pin 9 Of 
A10U9 > 4 V dc 



YES 



YES 



The Voltage 
At A10TP8 
-I- 10 V do? 



Check A10U9 And Associ- 
ated Components. 



The Driver Input 
Voltage At Pin 7 Of 
A10U4 > 4 V dc 



'^The Voltage^ 

At A10TP1 
Approx. 0 V dc 



YES 



YES 



Check A10U4 And Associ- 
ated Components. 



? 






? 



NO 



NO 



NO 



NO 



Troubleshoot The Attenu- 
ator Circuit (A10U18, 
Q35, Q37, Q38, Q39 , 040 
And Associated Com- 
ponents). 



Troubleshoot The Refer- 
ence Supply (All Assem- 
bly A10U7 and Associ- 
ated Components). 



Is 



Is 



Troubleshoot The Logic 
Circuit (A10U13, U22, 

U26 And Associated Com- 
ponents). 



The Device Select 
Signal At Pin 9 Of 
A10U13 > 4 V 
Peak -To -Peak . 



Troubleshoot The Logic 
Circuit (A10U13, U22, 

U26 And Associated Com- 
ponents). 



YES 



The Device Select 
Signal At Pin 9 Of 
A10U13 >4 V 
^ Peak -To -Peak 



YES 






? 



NO 



NO 



Troubleshoot The Device 
Select Circuit (A10U13, 
U14, U26 And Associated 
Components). 



Troubleshoot The Device 
Select Circuit (A10U13, 
U14, U26 And Associated 
Components) . 



3455-D-IO 





Is 



Is 



H he Switch Driv?^ 
Voltage At Pin 1 Of 
A10U6 Approx. 

+ 1 V dc? (Ignore 
s. The 2 Msec ^ 
pulse) 



''^The Switch Drived 
Voltage At Pin 14 Of 
A1 0U5 Approx. 

+ 1 V dc? (Ignore 
s. The 2 msec 
pulse) 



Check Switching FET's 
A10Q16, 021, 029, 031 , 
032, 038 And Associ- 

ated Components. 



YES 



YES 



NO 



NO 



Is 



Is 



Is 



Is 



The Gate Bias ^ 
Voltage At A10TP3 
Approx. + 1 V dc? 
(Ignore The 2 msec 
"X. pulse) 



The Gate Bias 
Voltage At A10TP3 
Approx. + 1 V dc? 
(Ignore The 2 msec 
X. Pulse) ^ 



The Driver Input 
Voltage At Pin 9 Of 
A10U5 > 4 V dc 



The Driver Input 
Voltage At Pin 7 Of 
A10U6 > 4 V dc 



Y 



YES 



YES 



Check A10U6 And Associ- 
ated Components. 



Check A10U5 And Associ- 
ated Components. 



? 



? 



NO 



NO 



NO 



NO 



Troubleshoot The Gate 
Bias Amplifier Circuit 
(A10U1, 05 And Associ- 
ated Components). 



Troubleshoot The Gate 
Bias Amplifier Circuit 
(A10U1, 05 And Associ- 
ated Components). 



Is 



Is 



Troubleshoot The Logic 
Circuit (A10U16, U22, 

U26 And Associated Com- 
ponents). 



The Device Select 
Signal At Pin 9 Of 
A10U16 > 4 V 
Peak -To -Peak 



Troubleshoot The Logic 
Circuit (A10U16, U22, 

U26 And Associated Com- 
ponents). 



YES 



The Device Select 
Signal At Pin 9 Of 
A10U16 > 4 V 
^ Peak -To -Peak . 



YES 



? 



7 



NO 



NO 



Troubleshoot The Device 
Select Circuit (A10U16, 
U14, U26 And Associ- 

ated Components). 



Troubleshoot The Device 
Select Circuit (A10U16, 
U14, U26 And Associ- 

ated Components). 



Figure 8-H-16. Inguard Troubleshooting Procedure Diagram, 

Auto-Cal Circuitry TEST 0. 



8-109/8-110 
















Volt/Div. 

2a 

ov 



Wi'«foTm 1 

4 , *»**■•• 




Titne/Div. 
5 msec 



^ S^t ^ 

Turn The Instrument OPF. 
Disconnect The Test 
Jumper Located Between 
A10U27 And U28. Use A 
Clip Lead To Connect 
A10TP9 To Inguard 
Ground. Be Certain That 
The Test Jumper On The 
A3 Assembly Is Discon- 
nected And The Plug Is 
Disconnected From A1J7. 
The Front Panel GUARD 
Switch Should Be "In" 
Connecting GUARD and 
INPUT Low. Connect The 
Oscilloscope To A14TP1. 
Turn Instrument ON. 
Using A Clio Lead, 
momentarily Short 

A10TP10 To Inguard 
Ground. Apply - 10 V dc 
To The 3455A INPUT. 



The Majority Of The Inguard Logic And 
The A/D Converter Is Working. The 
Following Procedure Tests The Inguard/ 
Outguard Transfer Circuitry. 




Troubleshoot U26 Turn- 
On Circuit (A10U24, 19. 
9). 



NOTE 

Thne Signah Are Difficult Tv Observe 
On An Oscilloscope. An Alternate 
Method To Determine II The Signals Are 
1‘reseni Would Be To Use A Logic 
Probe. Such As The -lip- Model I0S25T 



Approximately 12 msec 


NO . 


Go To Outugard Trouole- 


In Duration And 
4 V P-To-P. Present . 




shooting Section. 




Troubleshoot F0 Transfer 
Circuit (A1Q9, A10U35. 
A10U27, AI0U28 And 
Associated Components) . 



» 


Connect The Oscilloscope 
To A3TP4. 


1 

Connect The Oscilloscope 
To A10U26 Pin 36. 




1 1 





Troubleshoot The Transfer 
Interrupt Circuit (A1Q7. 
A10T2. A10U32, A10U27, 
A10U28 And Associated 
Components). 






Troubleshoot The F2 
Transfer Circuit (A10Q43. 
A10U34, A3U9 And 

Associated Components. 







Figure 8-H-17. Inguard Troubleshooting Procedure Diagram, 
Inguard/Outguard Transfer Circuitry. 

8 - 111 / 8-112 



3455-D-IZ 

























A 



Measure The\_ 
Inguard Power 
Supplies 16 Labeled 
Test Points On The 
A10 Assembly). 

Are The Voltages 
Within ± 6% Of The 
Marked Values 
Also Measure ± 1 0 V 
Reference Supplies. . 
\ 



Connect The Oscilloscope 
ToA10U26.Rn 27. 



Troubleshoot The Ingusrd 
Power Supplies. 



1s 

The Clock 
Signal (Waveform 2) 
\ Present? / 



NO Troubleshoot Clock Cir* 
^ cult (A10U21, A10U23. 
" A10U28 And Associated 
Components). 



Measure ^ 
The Bies 

Voltage On Pin 38 
Of A10U26. Is 
This Voltage Within 
t J25 Volts Of The 
Value Marked 
On U26 



Replace A10R105 With 
The Proper Value. 



The Interrupt ^ 
Signal At Pin 29 
Of A10U26 Held 
High or Toggling 



^ Troubleshoot The Inter- 
■ ^ rupt Circuit (A10U9, 19. 

21. 24, 21 28. 32 And 
Associated Components). 



/A10R105 The\ 
Proper Value For 
The Voltage Marked 
On A10U267 

• 2X1 V- 737 kn 

-23V-6.04kn 

• 3.0 V - 4.75 kn 
-3.5 V -392 kn 
-4,0 V -3.32 kn 
•4.5 V -230 kn 

• 50 V - 2.37 kn . 



Are 

•^The Oats Signals^ 
On Pins 18 Through 
26 Of A10U26>4 
Volts Peek-To-Paak 
\ ? / 



NO Troubleshoot The I/O Cir- 
- cult (AlOUn. 12. 13. 16. 
16. 17. 22, 26,26,27 And 
Associated Components), 



Waveform 2 



Volts/Oiv 

1.0 







iM.- 



Turn Instrument OFF And 
Carefully Remove 

A10U26. Turn Instrument 
ON. 



Time/Div 
.5 usee 



-^he Bias Voltage^ 
On Pin 38 Of The 
ICSocket Within 
t .3 volts Of The 
Value Marked On 
U26? 



U26 May Have Aged And 
Replaced 



Replace A10U26. 



3455-B- 1 3 



Figure 8-H-18. Inguard Troubleshooting Procedure Diagram, 
Power Supply and Controller Circuitry. 

8-113/8-114 












Turn The Instrument OFF. 
Reconnect The Plug To 
A1J7. Be Certain That The 
Test Jumper On The A3 
Assembly Is Disconnected. 
Turn The Instrument ON. 




The Device Select ^ 
Signal Present At 
Pln9O1A10U157 
(This Signal Is A 
Negatlve*Golng Pulse 
Approximately 1 psec 
In Duration And 
> 4 Volts Pealt-To- 
\ Peak.) / 



Are \ 
The Signals At 
Pins 2, 10. And 12 
Of A10U1S > 3.5 
Volts Peak-To-Peak 
\ ? / 



Troubleshoot The Device 
Select Circuit (A10U14, 
U26 And Associated Com- 
ponents). 



Troubleshoot The A/0 
Switching Circuit 

<A10U15. A14U1. U2, Q1 
Through Q4 And Associ- 
ated Components). 



__X^The Voiiage^Ss.^^ 
At A14TP1 Greater 
•s..,TI«n + 10 Vdc^ 



The Voltage At 
Pin 14 Of The A14 
Assembly > + 4 V dc 
\ 



The Voltage At 
Pin 15 Of The A14 [ NO 
Assembly > + 4 Vde I 
\ / 



The Voltage At 
Pins Of The A14 
Assembly > 4 V dc 
■s. 7 ^ 



Troubleshoot The Inte- 
grator Circuit IA14U3. U4, 
05 , 04 And Associated 
Components). 



Troubleshoot The 


.2 V (5e- 1 


tect And Absolute Value 


Circuits {A14US, 


U6, 06 


And Associated 


Compo- 


nents). 





Troubleshoot The 10 V 
Detect And Absolute 
Value Circuits (A14U5, 
U6. 06 And Associated 
Components). 



The Voltage At 
Pin 15 Of The A14 
Assembly <t Volts 
± .3 V dc? ^ 



Troubleshoot The 10 V 
Detect And Absolute 
Value Circuits (A14U5. 
U6, 06 And Associated 
Components). 




The Voltage At 
PinSOf TheA14 
Assembly 0 Volts 
. ± .3 V dc? ^ 



Remove The 
from A14C2. 



Troubleshoot The 0 Detect 
Circuit (A14U6 And 
Associated Components). 



Troubleshoot The 0 Detect 
Circuit (A14U6 And 
Associated Components). 



If. At This Point. The Problem Has Not 
Been Isolated To A Circuit. Recheck The 
Symptonrrs To Be Certain The Problem 
Is In The Inguard Section Of The Instru- 
ment. Refer To The Theory Of Opera- 
tion And Schematics To Locate Prob- 
lems Not Covered By This Procedure. 



The A/0 Input ^ 
Voltage At A10TP4 
\ -lOVdc? ^ 



Troubleshoot The DC 
Preamp And Input Switch- 
ing Circuitry (Schematic 
No. 1). Be Certain That 
• 10 V dc Is Applied To 
The 34S5A Input Termi- 
nals. 



Force The Integrator To 
Auio-Zaro By Connecting 
A Clip Lead Between The 
Cathode Of A14CR8 And 
Inguard Ground. 



ReferenceN^. 

Voltage At A10TP7 
\ -lOVdc? / 



x'^The Reference's 
Voltage At A10TP8 
\ -f lOVdc? / 



Troubleshoot The Refer- 
ence Supplies (All Assem- 
bly, A10U7, A14U1. U2 
And Associated Compo- 
nents). 



The Voltage At 1 
A14TP1 0 Vdc ± .2 Vdcf 
\ ? > 



Troubleshoot The Inte- 
grator Circuit (A14U3, U4. 
□4. 05 And Associated 
Components). 




Figure 8-H-19. Inguard Troubleshooting Procedure Diagram, 



3455 - 0-12 



8-115/8-116 





















Model 3455A 



SERVICE GROUP H 



Section VIII 



8 H 8. OUTGUARD TROUBLESHOOTING. 

8-H-7. This section contains information and procedures to aid in troubleshooting the digital 
(outguard) portion of the 345SA. 

8-H-8. A Signature Analyzer (-hp- Model S004A) is required to perform the Outguard 
Troubleshooting procedures. If one is not available, it is suggested that the 345SA be returned to an 
-hp- Sales and Service Office for repair. 



8-117/8-118 




NOTE 1 



The Signature Analyzer Controls 
Should Be Set As Follows For This 
Test. 

LINE ON (IN) 

START "X. (IN) 

STOP y (OUT) 

CLOCK. y (OUT) 

HOLD OFF(OUT) 

SELF TEST. . . .OFF (OUT) 



^ S^i J 



Turn The Instrument OFF. 
Disconnect The Test 
Jumper On The A3 Assem- 
bly. Disconnect The Plug 
From A1J7. Set All HP-IB 
Address Switches To The 
"9" position (down). Turn 
The Instrument ON. 



Proper Operation Of The Outguard Test 
Routine Is Indicated By A Number Or 
Character Being Strobed Across The 
Display And The Front Panel Enunci- 
ators Being Alternately Lit- 



NOTE: 






The ALU Circuitry Is Working Correctly. 

i 

Go To The Device Select 
Troubleshooting Pro- 
cedure. 






3455-B-I7 



Figure 8-H-20. Preliminary Outguard Troubleshooting Procedure Diagram. 

8-119/8-120 









NOTE 1 

Vw Siqnaum Aitalyier CiiiHrols 
Should Be Set Ai hollows for I'liis 
Test: 

l.INt 0.\(l\') 

SIAHI \. I'/iV; 

STOf (out; 

CLOCK y (out; 

iiol.o on (OUT) 

SLI.T ThST OH (OUl) 

NOTE 2 

The hillowiuy Is A I isi Ot Compoiieuls 
Whkh Arc Cointeclcd To llie hrueessor 
Inpi/I DjIij Hus. 



Sdiemuiic 8 


Schenwlk 9 .Si hcnuilic 10 


MUh 


AWI 


AIV39 


AIV2I 


41013 


AIU60 


AW2J 


AIUI6 




AW27 


AIUI7 




A 11/34 


AWI8 




AIV33 


AIS! 





AWhJ 

AIU43 

AIH-IO 



WAVEFORM 1 




OV 



» 

fc. . - 



I I 



Time/Div. 
.5 »^soc 



Slai' 



J 



Be Certain Tiiat: The Tost 
Jumper On The A3 Assein- 
biy Is Disconnected, The 
Ploi) Is Disconnected From 
A1J7 And The HPIB 
Address Switches Are All 
Set To The ”0" position. 
Torn The Instrument ON. 



I 



Cheek The Following Pins 
On A1J6 For The Volt- 
ages Listed (A3 Assembly 


Plugged 


n): 


Pin 


Voltage 


A 


■s 5 V t .3 V 


M 


-• 9 V i .5 V 


L 


Equal To The 
Voltage Stamped 
On A3U9 t .3 V 



Turn The (netrument OFF. 
Warning: Make Sure The 
3455A Is Turned Off Or 
Incorrect Signatures May 
Be Present When The A3 
Board Is Reconnected. 
Remove The A3 Assem- 
bly And Connect It To An 
Extender Board. Place 
Tape Accross Pins B 
Through K (6 Pins) Of The 
Extender Board (To Break 
The Data Bus Connec- 
tions) And Insert It In 
A1J6. Connect The Sig- 
nature Analyaer START 
And STOP Inputs To 
A3TP3. Connect The 
CLOCK Input To A3TP5 
And The GND To The 
Chassis. (See NOTE 1 For 
Signature Analyzer Con- 
trol Settings. Turn In- 
struments ON. 



I 




Troubleshool 


The Power 


Supplies II 


The Voltage 


Al A1J6 Pm 


L Is Incor- 


reel. Be Certain That 


A3R3 Is The Proper Value 


For The Voltage Stamped 


On A3U9. 




Voltage 


Resistance 


S.0 V 


4.64 kn 


4,5 V 


2.87 kSt 


4.0 V 


156 kn 


. 3.5 V 


1 .37 kn 


3,0 V 


1 .00 kn 


2.5 V 


715 n 


. 2.0 V 


511 n 



Troubleshoot The Clock 
Circuit (Schematics). 



1 



Use The Signature Analy 


^er To 


Check The Signa- 


tures On The Following 


Pins Of The A3 Assembly: 


Pm 


Signature 


B 


3A9C 


C 


H3FH 


D 


P2F8 


E 


62PP 


F 


7078 


H 


F757 


J 


15FU 


K 


97C6 



■t-5 V: 4F53 




Connect 


The Signature 


Analyzer 


START Anrf 


STOP Inputs To A3TP2 


And Check The Following 


Signatu res: 


Pin 


Signature 


B 


8AAF 


C 


693A 


D 


C304 


E 


4F60 


F 


C43U 


H 


4CHH 


J 


6C93 


K 


9H95 



■^5 V: CH29 




Connect 


The Signature 


Analyzer 


START And 


STOP Inputs To A3TP3 


And Check The Following 


Signatures: 


Pin 


Signature 


B 


PC79 


C 


A102 


D 


7AAU 


E 


OC52 


F 


6UAO 


H 


H8CH 


J 


1P29 


K 


U478 



+ 5V; 02C2 



I 








Waveforms^ 






Replace The A3 Assembly. 




<; >4v 


Replace The A3 Assembly. 




k -To . P eak./ 







Connect 


The Signature 


Analyror 


START And 


Stop Inputs To A3TP4 


And Check The Following 


Signatures: 


Pin 


Signature 


B 


CHC4 


C 


6COP 


D 


A43P 


E 


129C 


F 


OC93 


H 


CP65 


J 


F517 


K 


6P03 



■tS V: 79FU 




Connect 


The Signature 


Analyzer 


START And 


STOP Inputs To A3TP3 


And Check The Following 


Signatures: 


Pin 


Signet ure 


4 


U5P6 


7 


23F9 


9 


2A6F 


10 


3A9F 


11 


6242 



-i-5 V: 02C2 




Um An Oscilloscope To 
Measure The Amplitude Of 
The Waveforms Al A3TP1 , 
TP2.TP3, And TP4. 



I 



The Mam Controller Test Routine Is 
Operating Properly. 



i 



Use An Oscilloscope To 
Measure The Amplitude Of 
The Signals On The Proces- 
sor Date Bus Lines At The 
Following Points: 

A1U34 Pins 5.9, 12 
A1U42 Pins2,5,9,12 




The Processor Input 
Operating Properly. 



i 



Turn The Instrument OFF. 
Remove The A3 Assembly 
From The Extender Board 
And Replace It In The 
Instrument. (Be Sure To 
Remove The Tape From 
The Extender Board ! Turn 
The Instrument ON. 



I 



Go To The RAM Trouble- 
shooting Procedure. 



3455-C-I8 



Refer To Schematic 3 To 
Determine Which Data Bus 
Lme (09 Through 071 Is 
Being Held. Troubleshoot 
The Components Which 
Are Connected To This 
Line. ISee Note 2.1 

In Most Cases, A High 
Resolution Voltmeter 
(1 pV Resolution) May Be 
Used To Determine The 
Bad Component. If The 
Data Line Is Being Held 
Low, The Component With 
The Lowest Voltage 
Reading Will Generally Be 
The Faulty Part. If The 
Line Is Being Held High, 
The Bad Pan Will Normal- 
ly Have The Highest 
Voltage Reading. 

When Troubleshooting The 
Processor Data Bus. The 
A3 Assembly Should Be 
Removed From The Instru- 
ment. IBcSureTo Remove 
The Tape From The 
Extender Board.) 



Figure 8-H-21. Outguard Troubleshooting Procedure Diagram, 
Main Controller Circuitry. 



8 - 121 / 8-122 



























The following signatures ere for the outgo erd RAM circuits. The 
signatures are taken with the start/stop inputs of the signature 
analyzer connected to A3TR1. 



NOTE 

•*Th«« slgnaiurti apply whtn V44 and U4S art 
removed from their tochets. 

•To obtain this signature, a 10 K resistor must be 
connected between the 5 volt TP and the probe Up 
of the signature analyeer. 



To check for proper logic tracer connections verify 
signature of *S lest point Is 4FS3. The signatures In 
>6V: 4F53 Oils section take one or two readings to stabllUe. 



Pin 


Signature 


U34 1 


7622 


2 


184P 


3 


1B4P 


4 


7622 


S 


7FPH 


6 


7FPH 


7 


0000 


B 


AFOP 


9 


AFOP 


10 


7622 


11 


UHUC 


12 


UHUC 


13 


7622 


14 


4FS3 


U35 1 


3A71 


2 


184P 


3 


184P 


4 


3A71 


5 


7FPH 


6 


7FPH 


7 


0000 


8 


AFOP 


9 


AFOP 


10 


3A71 


11 


UHUC 


12 


UHUC 


13 


3A71 


14 


4FS3 


U36 1 


4FS3 


2 


F281 


3 


AFOP*7078V 


4 


UHUC*F757*,* 


5 


7FPH*15FU*.* 


6 


184P*97C6*,’* 


7 


183F 


8 


0000 


9 


1PP6 


10 


183F 


11 


671 F 


12 


FF11 


13 


1UFP 


14 


143A 


15 


68P0 


16 


4F53 



rin 


Signature 


U37 1 


4FS3 


2 


F281 


3 


P6PH*3A9C*.*» 


4 


P961*H3FH*/* 


5 


8CPA*P2F8*.** 


6 


PH16*62PP*/* 


7 


4F53 


8 


0000 


9 


1PP5 


10 


4F53 


11 


93AF 


12 


U6FF 


13 


OHAH 


14 


4AC4 


15 


183F 


16 


4F53 


U38 5 


1PP5 


8 


1PP5 


11 


F281 


12 


1PP5 


13 


9037 


U39 8 


HF64 


9 


9037 


U42 1 


7822 


2 


P6PH 


3 


P6PH 


4 


7622 


5 


P961 


6 


P961 


7 


0000 


8 


PH16 


9 


PH16 


10 


7622 


11 


8CPA 


12 


8CPA 


13 


7622 


14 


4F53 


U43 1 


3A71 


2 


P6PH 


3 


P6PH 


4 


3A71 


5 


P961 


6 


P961 


7 


0000 


8 


PH16 


9 


PH16 


10 


3A71 


11 


8CPA 


12 


8CPA 


13 


3A71 


14 


4F53 



Pin 


Signature 


U44 1 


93AF 


2 


U6FF 


3 


OHAH 


4 


4AC4 


5 


1UFP 


6 


FF11 


7 


671F 


8 


0000 


9 


AFOP*7078’.’ 


10 


184P*97C6*,** 


11 


UHUC*F757*.* 


12 


7FPH*15FU*.’ 


13 


9037 


14 


7622 


15 


MSA 


16 


4F53 


U45 1 


93AF 


2 


U6FF 


3 ' 


OHAH 


4 


4AC4 


s 


1UFP 


6 


FF11 


7 


671F 


8 


0000 


9 


PH16*62PP*.** 


10 


8CPA‘P2F8',** 


11 


P961*H3FH‘/' 


12 


P6PH*3A9C*.*' 


13 


9037 


14 


7622 


15 


143A 


16 


4F53 


U46 1 


HF64 


2 


7622 


3 


3A71 



NOTE 1 



f 



The Signature Analyzer Controls 
Should Be Set Follows For This 
Test: 

LINE ON (IN) 

START. "V (IN) 

STOP y(OUT) 

CLOCK. J~(OUT) 

HOLD OFF (OUT) 

SELFTEST OFF(OUT) 



NOTE 2 



The Following Is A List Of Components 
Which Are Connected To The Output 
Data Bus. 



Schematic 8 Schematics Schematic 10 



AiU23 


AWiI 


AWSi 


A1U24 


AWI8 


AW54 


AW25 


AW19 


AiU63 


AW29 


A1U20 


AW64 


AIU3I 


A1U26 


AiU65 


A1U34 




AIU66 


A1U3S 




A1U67 


A1U36 




AiU6S 


AW37 




AIU69 


A1U42 




AW70 


A1U43 







Start 

Be Certain That The Test 
Jumper On The A3 Assem- 
bly Is Disconnected, The 
Plug Is Disconnected From 
A1J7 And All HP-18 
Address Switches Are Set 
To The "9" Position. Torn 
Instrument ON. 



I 



Connect The Signature 

Analyzer START and 

STOP Inputs To A3TP1. 
Connect The CLOCK 

Input To A3TP5 And The 
GNO To The Chassis. (See 
NOTE 1 For Signature 

Analyzer Control Settings,) 



I 



Use The 


Signature Anal- I 


zer To Check The RAM 


Output Signatures At The 


Following Points: 


Location 


Signature 


A1U34 




Pin 2 


184P 


Pins 


7FPH 


Pin 9 


AFOP 


Pin 12 


UHUC 


A1U42 




Pin 2 


P6PH 


Pin 5 


P961 


Pin 9 


PH16 


Pin 12 


8CPA 




The RAM Circuits Are Operating Cor- 
rectly. 



i 



Go To The ALU Trouble- 
shooting Procedure. 



3455 - 8-20 



1 



Check The 


Signatures At 


The Following Points: 


Location 


Signature 


: A1U44 


Pin 9 


AFOP 


Pin 10 


184P 


Pin 11 


UHUC 


Pin 12 


7FPH 


A1 U45 
Pin 9 


PH16 


Pin 10 


8CPA 


Pin 11 


P961 


Pin 12 


P6PH 




Go To The Device Select 
Troubleshooting Proced- 
ure. 



Turn The Instrument OFF 
And Carefully Remove 
A1U44 And U45. Turn 
The Instrument ON, 



Output Buffer A1U35 Or 
AIU43. 



I 



Check The 


Signatures At 


The Following Points: 


Location 


Signature 


A1U44 




Socket 




Pin 1 


93AF 


Pin 2 


U6FF 


Pin 3 


OHAH 


Pin 4 


AACA 


Pin 5 


1UFP 


Pine 


FF11 


Pin 7 


671 F 


Pin 16 


143A 




Go To The Device Select 
Troubleshooting Proced- 
ure. 



1 

Turn The Instrument OFF. 
Connect A 10 kO Resistor 
Between The -t-B V Test 
Point On The A1 Assembly 
Artd The Probe Tip Of The 
Signature Analyzer Turn 
The Instrument ON. 

i ' 

Check The Signatures At 
The Following Points: 

Location Signature 

A1U44 

Socket 

Pin 9 7078 

Pin 10 97C6 

Pin 11 F757 

Pin 12 15FU 

A1U46 
Socket 

Pin 9 62PP 

Pin 10 P2F8 

Pin 11 H3FH 

Pin 12 3A9C 




Presettable Counter 

A1U36 Or U37. 




Data Bus Output Buffers 
A1U34 or U42. 



A Signature Of 0 0 0 0 
Indicates The Output Data 
Bus Line Is Being Held 
Low. Troubleshoot The 
Components Which Are 
Connected To This Line, 
(Sea Note 2.) 

In Most Cases, A High 
Resolution Voltmeter 
(1 pV Resolution) May Be 
Used To Determine The 
Bed Component. In Gen- 
erel. The Component Hold- 
ing The Line Low Will 
Have The Lowest Voltage 
Reeding. When Trouble- 
shooting The Data Bus, 
The A3 Assembly Should 
Be Removed From The 
Instrument. 



NOTE 3 

Be Sure To Remove The 10 
Resistor Connected Between The 
Signature Analyzer Probe Tip And 
The +S V Test Point. 

Replace A 1U44 And A 1 U4S. 



Figure 8-H-22. Outguard Troubleshooting Procedure Diagram, RAM Circuitry. 

8-123/8-124 

















The following signatures are for the outguard ALU circuits. The 
signatures are taken with the start/stop irtputs of the signature 
analyzer connected to A3TP2. 



NOTE 

•To obtain this signature, a 10 K resistor must be 
connected between the S volt TP and the probe tip of 
the signature analyter. 

To check for proper signature analyser connections 
verify signature of *S V test point Is CH79. 

+ 5V: CH29 



Pin 


Signature 


U16 4 


CPP3 


s 


CPP3 


6 


03FA 


U21 1 


6457 


2 


8CPU 


3 


9954 


4 


6457 


S 


UPUH 


6 


5042 


7 


0000 


8 


6A09 


9 


2131 


10 


6457 


11 


U330 


12 


HAF7 


13 


6457 


14 


CH29 


U22 1 


6457 


2 


9445 


3 


PP05 


4 


6457 


B 


CPOH 


6 


AH54 


7 


0000 


8 


2A69 


9 


P0F9 


10 


6457 


11 


530U 


12 


F84U 


13 


6457 


14 


CH29 


U23 1 


CH29 


2 


08U7 


3 


UHOl* 


4 


17A6* 


5 


2762 


6 


FH98* 


7 


3U52 


8 


0000 


9 


U23H 


10 


9U2A 


11 


32UF* 


12 


scoe 


13 


FAA3* 


14 


3S41* 


15 


6673 


16 


CH29 



Pin 


Signature 


U24 1 


CH29 


2 


A81P 


3 


UHOl* 


4 


17A6‘ 


5 


37FH 


6 , 


FHSe 


7 1 


9P30 


8 1 

1 


0000 


1 

9 


3UFF 


10 


94AU 


11 


32UF* 


12 


CH29 


13 


CH29* 


14 


CH29* 


15 


CH29 


16 


CH29 


U25 1 


CH29 


2 


6406 


3 


FAA3* 


4 


3541* 


5 


9C0F 


6 


150U 


7 


H4UF 


8 


0000 


9 


3UFF 


10 


3P95 


11 


21H1* 


12 


CH29 


13 


CH29* 


14 


CH29* 


16 


CH29 


16 


CH29 


U28 1 


6406 


2 


UCH6 


3 


9U2A 


4 


3US2 


5 


2762 


6 


08U7 


7 


0P6P 


8 


6673 


9 


HAF7 


10 


8CPU 


11 


UPUH 


12 


0000 


13 


2131 


14 


32AC* 


15 


F693 


16 


CPP3 


17 


5C84 


18 


3P95 


19 


HHF5 


20 


H4UF 


21 


H074 


22 


gcoF 


23 


87C2 


24 


CH29 



Pin 


Signature 


U29 1 


CH29 


2 


UCH6 


3 


FAA3* 


4 


3541* 


5 


87C2 


6 


150U 


7 


H074 


8 


0000 


9 


25H1 


10 


HHF5 


11 


21H1* 


12 


CH29 


13 


CH29* 


14 ! 


CH29* 


15 


CH29 


16 


CH29 


U30 1 


A81P 


2 


5H5C 


3 


9U2A 


4 


3U52 


5 


2762 


6 


08U7 


7 


5C08 


8 


5673 


9 


9445 


10 


CPOH 


11 


P0F9 


12 


0000 


13 


F84U 


14 


1456 


15 


0129 


16 


0P6P 


17 


HAP6 


18 


94AU 


19 


3H92 


20 


9P30 


21 


59H2 


22 


37FH 


23 


1HHA 


24 


CH29 


U31 1 


CH29 


2 


SH5C 


3 


UHOl* 


4 


17A6* 


5 


1HHA 


6 


FH98 


7 


59H2 


8 


0000 


9 


25H1 


10 


3H92 


11 


32UF* 


12 


CH29 


13 


CH29 


14 


CH29 


IS 


CH29 


16 


CH29 



NOTE 1 



The Signature Analyzer Should Be 
Set As Follows For This Test. 



LINE. . . . 
STAHr. . . 
STOP. . . . 
CLOCK. . . 
HOLD . . . 
SELF TEST 



. . ON ON) 
. ^ ON) 
yfouT) 
y(ouT) 

OFF (OUT) 
OFF (OUT) 




Check The Following ALU 
Output Signatures: 



Location Sigrtature 
A1 U34 

Pin 2 6A09 

Pin 5 5042 

Pin 9 U330 

Pin 12 9954 



¥ 



¥ 




The ALU Circuit Is Operating Correaly. 



. . I - _ 

Go To The Device Select 
Troubleshooting Proced- 
ure. 



3455- D- ISA 



I 



Check The Signatures At 


The Following Points: 


Location 


Signature 


A1U21 




Pin 2 


8CPU 


Pin 5 


UPUH 


Pin 9 


2131 


Pin 12 


HAF7 




Check The 


Signeiures At 


The Following Points; 


Location 


Sigrtature 


A1U29 


Pin 2 


UCH6 


Pin 5 


87C2 


Pin 7 


H074 


Pm 10 


HHF5 




Check The 


Signatures At 


The Following Points; 


Location 


Signature 


A1U25 




Pin 2 


6406 


Pin S 


9COF 


Pin 7 


H4UF 


Pin 10 


3P95 




Input Latch A1U25 Or 
ALU A1U28- 



I 



Check The 


Signatures At 


The Following Points: 


Location 


Signature 


A1U22 


Pin 2 


9445 


Pin 5 


CPOH 


Pin 9 


P0F9 


Pin 12 


F84U 




Check The 


Signatures At 


The Following Points: 


Location 


Signature 


A1U31 


Pin 2 


5H5C 


Pin 5 


1HHA 


Pin 7 


59H2 


Pin to 


3H92 



Go To The Device Select 
Troubleshooting Pro- 
cedure. 



Are 
These 
Signatures 
Correct? 









Go To The Device Select 


J Select Signature 1^^^^ 


Troubleshooting Pro- 


1 At Pin 9 Of I 

A1U3125H1 


cedure. 



1 Check The 


Signatures At 


The Following Points: 


Location 


Signature 


A1U24 




Pin 2 


A81P 


Pin 5 


37FH 


Pin? 


9P30 


Pin 10 


94AU 



Input Latch 
ALU A1U30. 



A1U31 Or 




' Check The 


Signatures At 


The Following Points; 


Location 


Signature 


A1U23 


Pin 2 


08U7 


Pin 5 


2762 


Pin 7 


3U52 




9U2A 




5C08 




5673 



Input Latch 
ALU A1U30. 



I 




Figure 8-H-23. Outgi.«rd Troubleshooting Procedure Diagram. ALU Circuitry. 

8-125/8-126 
























NOTE 1 



The Signature Analyser Controls 
Should Be Set As Follows For This 
Test: 

LINE ONflNJ 

START (IN) 

STOP J'(OUT) 

CLOCK y(OUT) 

HOLD OFF (OUT) 

SELF TEST OFF (OUT) 



+5V; 02C2 



Be Certain That; The Test 
Jumper On The A3 Assem- 
bly Is Disconnected. The 
Plug Is Disconnected Prom 
A1J7 And The HP-16 Ad- 
dress Switches Are All Set 
To The "0" Position. Tori* 
The Instrument ON. 



Connect The Signature 
Analyzer START And 
STOP Inputs To A3TP3. 
Connect The CLOCK 
Input To A3TP5 And The 
GND Input To Chassis. 
(See Note 1 For Signature 
Analyzer Control Settings.) 



Use The Signature Analy- 
zer To Check The Device 
Select Input Signatures At 
The Following Points: 


Location 


Signature 


A1U33 
Pin 1 


6242 


Pin 2 


3A9F 


Pin 3 


2A6F 


Pin 4 


23F9 



^ Are 
These 
Signatures 
Correct? 



The Signature 
At A1U46 Pin 3 
— . 5AP5? / 



The Signature 
At A1 U46 Pin 2 
•\ U5P6? / 



The Signature 
At A1U46 Pin 1 
\ 5857? / 



' The Signature ^ 
At A1U38 Pin II 
\ CU60? / 



A3 Assembly A1U32. U34. 
U39 U42. U44. U45 Or 
U46. 



The Signature^ 
At A1U38 Pin 8 
•s. P737? / 



The Signature^N. yes 
A t A1U38 Pin 12 
\ P737? 



A1U38 Or U41. 



A1U36, U37. Or U38. 



A1 U36. U37 Or U38. 



The Signature ^ 
At A1U39 Pin 10 
\ 2P58? / 



'’^The Signature^ 
At A1U32 Pin 3 
\ 02C2? ^ 



A1U19, U20 Or U32. 



The Signature^ 
At A1U39Pin11 
•\ 2FPA? / 



A1U18.U170r U39 



The Signature 
At A1 U8 Pin 2 
\ 4C96? / 



The Signature 
At A1U32 Pin 11 
\ 02C2? 



A1U11.U26 Or U32 



A1U35, U43 Or U46. 



''^The Signature^ 
At A1U32 Pm 4 
\ 2FPA? ^ 



A1U32 Or U41 



The Signature^ 
Ai A1U33 Pm 11 
\ 5UH2? / 



A1U21.U22or U33. 



The Signature 
At AlUSPin 1 
\ 4924? ^ 



A1U8.U16. U16, Or U18. 



The Signature 
At AI U7 Pin 6 
\ HC61? / 



The Signature ^ 
At A1U41 Pm 13 
\ AC4A? / 



A1U41, U48, U54 Or U63 



^ The Signature^ 
At A1U39 Pin 9 
V. BAPS? / 



Turn The Instrument OFF 
And Carefully Remove 
RAM's A1U44 And U45. 
Turn The Instrument ON- 



•"^The Signature^ 
AIA1U39 Pin 9 
•s. Now 5AP5?^ 



The Signature 
At A1U32 Pin 5 
•\ U754? / 



' The Signature ^ 
At A1U33 Pm 12 
\ 7731? 



A1U24. U25 0r U33. 



Tyes 


/ '* \ 

The Signature YFS 


A1U32 Or 039 


1 


At A1U39 Pin 13 • 




USP6? 





The Signature ^ 
At A1U32 Pin 10 
\ 4924? 





The Signature NO ^ 




The Signature NO ». 




1 AI 032 Or 041 


AtA1U7 Pm 5 ^ • 


A1U7 Or A1U41 


C AtA1U41 Pm 15 


A1U41 Or U64 




H9H3? 




0207? 





The Signature ^ 
At A1U33 Pin 13 
\ H4CH? 



J 1 >0 






\ AI 029. 031 Or 033. 1 


A104. 08. Or U32. 


A1U1 Or A1U7 



A1U38, U39 Or U41. 



A3 Assembly A1U32. U34. 
U39. U42. U44, U45 



**^The Signature^ 
At A)U33 Pm 7 
\ 0066? ^ 



A1U33 Or U64 



A3 Assembly Or A1U33, 
U41. 



RAM A1U44 Or 045. 



The Signature ^ 
At A1U33 Pm 14 
\ 5A8F? / 



A1U23 Of U33 



The Signature 
At A1U33 Pin 
\ F541? 



A1U33 0r 051 



The Signature 
At A1U33 Pin 9 
\ 1764? / 



A1U33 Of A1Q7 



The Device Select Circuits Are Operating 
Correctly. 



3455 - 0-19 



Go To The 


Interrupt 


Troubleshooting 


Proced- 


ure. 





The Signature ^ 
At A1U33 Pm 10 
55PA? / 



A3 Assembly Or A1U33 



Figure 8-H-24. Outguard Troubleshooting Procedure Diagram. 
Device Select Circuitry. 



8-J27/8-128 








































NOTE 1 

The Signature Analyzer Controls 
Should Be Set As Follows For This 
Test: 

LINE ON (IN) 

START. ~\ (IhlJ 

STOP /(OVT) 

CLOCK. y(OUT) 

HOLD OFF LOUT) 

SkLFTEST OFF(OUT) 



+ 5V: 79FU 



3455-D- 21A 






Be Certain That; The Test 
Jumper On The A3 Assem- 
bly Is Disconnected, The 
Plug Is Disconnected From 
A1J7 And The HP-IB 
Address Switches Arc All 
Set To The "Q" Position. 
Turn The Instrument ON, 



I 



Connect The Signature 
Analyzer START And 
STOP Inputs To A3TP4. 
Connect The CLOCK 
Input To A3TP5 And The 
GNO Input To Chassis, 
<See Note I For Signature 
Analyzer Control Settings.) 




Use An Oscilloscope To 
Measure The Display Inter- 
rupt Signal At A1U53, Pin 
3. This Signal Should Be A 
Negative-Going Pulse 

Approximately 1 msec In 
Duration Followed By A 
Negative-Going Pulse 

Approximately 2.8 msec In 
Duration, Amplitude 

Should Be About 4 V 
Peak-To-Peak. 



Connect The Oscilloscope 
To A1U55 Pin 4. Press 
And Hold One Of The 
Front Panel Keys (Except 
LINE, LOCAL And 
GUARD). The Front Panel 
Interrupt Signal Should Be 
A Negative-Going Puls^ 
Approximately 15 msec 
In Duration And 4 V Peak- 
To-Peak 



^*For instruments with serial number 
1 622A01 505 and below the pulse is 5 
msec wide. 

Bpor Instruments with serial number 
1622A01S06 and above end with a 
Rev. D of the A1 board. The pulse is-. 
positive when keys are pushed and 
negative when keys are released, 

Cpor instruments with serial number 
1 622A03538 and above or where Ser- 
vice Note 3455A-13 has been im- 
plemented, the negative pulse is 1.5 
msec wide. 



Go To The HP-IB Trouble- 
shooting Procedure. 




Connect The Signature 
Analyzer START AND 
STOP Input To A3TP3. . 






One-Shot Multivibrator 

A1U48, A1C29, A1R42, 




Gate A1U53, Or Decoder 
A1U56- 




Decoder A1U41. One-Shot 
Multivibrator A1U48, Or 
Latches A1U54 And 
A1U63. 



^ 6>i$ec If A1 C32 is a .66 fiF capacitor. 



Connect 


The 


LOGIC 


TRACER 


START And 


t STOP Inputs T3 


A3TP3. 


Press And 


Hold 


One Of 


The Front 
Keys. 


Panel 


RANGE 



AtA1U55Pin3 


- 




1 The Same As 

L The Signature 


Gate A1U55. 


J 



Connect The Oscilloscope 
To A1U55 Pin 3. Press 
And Hold One Of The 
Front Panel Keys. The En- 
able Sigrtal Should Be A 
Negative-Going Pulse Ap- 
proximately 1 5 msec* In 
Duration And 4 V Peak- 
To-Peak 



^ Panel Interrupt [mq 


Go To The Display Trou- 


Signature 

k. AtAlU48Pin2 J 


bleshooting Procedure. 



42AP? 



[YES 



One-Shot Multivibrator 
A1U48, A1C32, A1R41, 
A1U40, Latch A1U58, 
And Gates A1U47, Or 
A1U55. 




Connect A Clip Lead To 
The EXTERNAL TRIG- 
GER Input (Rear Panel 
BNC). Connect The Signa- 
ture Analyzer Probe To 
A1U53 Pin 4, This Point 
Should Be Low (Signature 
Of 0000, and Probe Light 
OFF.) Momentarily Touch 
The Clip Lead To The 
+5 V Test Point And Then 
To Chassis Ground. 




Go To The Display Trou- 
bleshooting Procedure. 



Use The Signature Analy- 
zerTo Read The Signature 
At A1U53 Pin 6. Be Sure 
The START And STOP 
Inputs To The Signature 
Analyzer Are Connected 
TOA3TP4. 




NO . 


Gate A1U53 Inverter 




A1 U52 Gate A1U55. 




Figure 8-H-25. Outguard Troubleshooting Procedure Diagram, 
Interrupt Circuitry. 



8-129/8-130 

























Th« fodowing $ign»tures an for tt>« outguard DisMav circuits. The 
signeture* are taken with the nart/nop inputs of The signature 
analyzer connected to A3TP3. 



NOTE 



*7o obtain ihH signaturt, a 10 K rtilstor mutt b« 
conntcttd batwten tfi« 5 volt TP and the probe tip of 
the signature anatyier. 

**To obtain this signature, press and hoid the 
front panel MATH OFF kay- 

tTo obtain this signature, press and hold the front 
pane! LOCAL hey. 

tfTo obtain this signaturt, press and hold the front 
panel DCV hey. 



♦ 5V: 02C2 



Pin 


Signature 


LM6 8 


5AP6 


9 


CUA4 


10 


4F88 


U49 1 


66H6t 


2 


6464T 


4 


Probe Tip Blinks 


5 


3AAA 


6 


3818 


U50 1 


66H6t 


2 


3618 


3 


6F34T 


4 


401 Ftt 


5 


6464T 


6 


42APtt 


8 


401 F 


9 


42AP 


10 


42AP 


11 


66H6T 


12 


6464t 


U61 2 


42AP 


3 


CF21* 


4 


U65A* 


5 


31CU 


6 


7AAU* 


7 


3AAA 


9 


FS41 


10 


AU99 


11 


OC52» 


12 


1U38 


13 


6UA0' 


14 


H8CH* 


15 


6464 


U62 6 


02 C2 


6 


0000 


8 


0000 


9 


02C2 


10 


66H6T 


11 


64641 


12 


02C2 


13 


0000 


U53 8 


330H 


9 


31 CU 


U54 2 


5HAF 


3 


6UAO* 


4 


H8CH* 


5 


FU84 


6 


1P29* 


7 


CUA4 


9 


AC4A 


10 


4F88 


11 


1 0478* 



To cheek for proper logic tracer connections verify 
signature of *S V test point Is 0X2. 



Pin 


Signature 


U56 1 


3F6A 


2 


Probe Tip Slinks 


3 


6144 


4 


Probe Tip Blinks 


5 


A874 


6 


F4SA 


7 


PACP 


9 


5381 


10 


1P93 


11 


74AP 


12 


OPF4 


13 


6757 


U57 1 


330H** 


3 


401F1T 


4 


64641 


6 


64641 


7 


64641 


9 


64641 


14 


401F11 


U58 3 


6464t 


4 


64641 


6 


64641 


11 


64641 


13 


6F341 


U59 3 


OP6C 


6 


2H84 


8 


F400 


It 


543C 


060 3 


3071 


6 


0478 


8 


55H6 


11 


9A99 


062 1 


F084 


2 


COA4 


6 


4F88 


7 


SHAF 


9 


A29F 


10 


904A 


11 


6836 


12 


6863 


13 


05 A4 


14 


5AP6 


IS 


P579 


063 2 


6757 


3 


CF2f 


4 


U65A* 


5 


6144 


6 


7AAO* 


7 


3SFA 


9 


AC4A 


10 


54A7 


11 


0C52* 



Pin 


Sgnature 


064 1 


02C2 


2 


0066 


3 


0478* 


4 


1961 


5 


CH2H 


6 1 


F62P 


7 


60C6 


9 , 


HA33 


10 


0395 


13 


1P29 


14 


0000 


15 1 


0207 


1 


02 C2 


2 


2S7C 


3 


CF21* 


4 1 


U65A* 


5 


3804 


6 


7AAO* 


7 


2690 


9 


60C6 


10 


1AHF 


11 


0C62* 


12 1 


HP7S 


13 1 


60A0* 


14 


K8CH* 


IS 


63 A2 


066 1 


02C2 


2 


H9C8 


3 


CF21* 


4 


065A* 


5 1 


9CC8 


6 


7AAO* 


7 . 


21C3 


9 


F62P 


10 


25CC 


11 , 


OC62* 


12 


142F 


13 ' 


6UA0* 


14 


H8CH* 


15 


A19P 


067 1 


02C2 


2 


06C1 


3 


CF21* 


4 


U65A' 


5 


AH7A 


6 


7AAO* 


7 


8FHP 


9 


1961 


10 


A2C1 


11 


OC52* 


12 


P6AA 


13 


60A0* 


14 


H8CH* 


15 


86SH 



U68 1 

3 

3 

4 

5 

6 
7 

9 

1C 

11 

12 

13 

14 

15 

U69 1 

2 

3 

4 

5 

6 
7 

9 

10 
11 
12 

13 

14 
1$ 

U70 1 

2 

3 

4 

5 

6 

7 

9 

10 

11 

12 

13 

14 

15 

U71 2 

3 
6 

8 

11 

13 

IS 

17 



Signature 

02C2 

89SP 

CF21* 

U6SA» 

4P3H 

7AAU* 

F9A4 

HA33 

86 C7 

OCS2* 

379H 

6UAO* 

H8CH* 

58 P8 

02C2 

3H62 

CF21* 

U65A* 

AAHH 

7AAU* 

709A 

CH2H 

P2P7 

0C52* 

2851 

6UAO* 

H8CH* 

0S2A 

02C2 

766P 

CF21* 

U65A* 

26PP 

7AAU* 

086F 

U395 

F96P 

OCS2* 

OSOC 

6UAO* 

H8CH' 

2867 

A29F 

P579 

6863 

USA4 



904A 

6836 

5AP6 

54A7 




NOTE ; 



The Signature Analyzer Controls 
Should Be Set As Follows For This 
Test! 



LINE ON (IN) 

START \-(lN) 

STOP J‘(OUT) 

CLOCK y(OUT) 

HOLD OFF(OUT) 

SELFTEST OFF(OUT) 



NOTE 2 

A Character, Starting At The Most Sig- 
nificant Digit, Is Strobed Across The 
Display. The Characters Displayed Are 
l.2,3.4.5.6.7.8,9.l,l.".r,L, Blank And 
Period. Each Character Is Strobed Across 
The Display Twice. The Decimal Point 
Accompanies The Character On The 
Second Strobing Sequence. Also, In The 
Least Significant Digit, The Decimal 
Point Is Lit On Each Strobe. The Only 
Meaningful Displaying Of The + And ■ 
Signs Is Before The Number 0 And 1 
Start Their Display Sequence. The Time 
Required To Run The Complete Test 
Is 3 Minutes. 



( Si^ ^ 



Be Certain That; The Test 
Jumper On The A3 Assem- 
bly Is Disconnected, The 
Plug Is Disconnected Prom 
A1J7 And All HP-IB 
Switches Are Set To The 
"0 " position. Turn The 
Instrument ON. 



I 



Connect The Signature 
Analyzer START Artd 
STOP Inputs To A3TP3. 
Connect The CLOCK 
Input To A3TP5 And The 
GND Input To The 
Chassis. (See Note 1 For 
Signature Analyzer Control 
Settings.) 



I 



. W 1 

Press And Hold The Front 
Panel LOCAL Key. 


•tev: 02C2 




The Signature^^ 


N. NO 1 


^ The Signature"^ 


'^YES . 






ls^\. 


*\At A1U61 Pin 2 
1H8A? 




At A1U61 Pin 5 
1U38? 




Gate AtUdI. 




The Signature ^ 
1 330H When 


INO 


The Signature ^ 


NO 1 


Input Latch A1U51 Or 


1 Each Key Is 

'“n. Pressed 




•Sw At A1U51 Pin 6 
31CU? 


^ * 


A1U53. 



While Observing A1U57 
Pin 14 With The Signature 
Analyzer, Press Each Of 
The Remaining Keys 
Except The LINE And 
GUARD Keys). 



rvEs 



Inverter A1U53, Switches 
S1-S6, S10-S13, S23- 
S28, Cable A2W2 Or 
A1U57. 



I 



The Signature 
1 401 F When 


NO » 


/ Is 

The Signature ^ 


s. NO ^ 


Input Latch A1U51 Or 




The External \ 
1 Trigger Interrupt 


^NO > 


The Signature ^ 


■s^ES ^ 


Inverter A1U52 Or Gates 


1 Each Key Is 

k. Pressed 




At A1U51 Pin 2 
42AP? 




Inverter A1 U50. 




1 Signature At 

\ A1U52Pin6 ^ 




•C At A1U52 Pin 5 
AH2C? 




A1U46 Or A1U53. 



lYES 



lYES 



Inverter A1U50, Switches 
S2, S7 -S9, S13, S15-S22, 
Cable A2W2 Or A1U57. 



The Signature 
At A1U58 Pins 
3,4,6 6464 
When The 
LOCAL Key 
Is Pressed 
? 



NO 




The Signature 



AtA1U58Pin1I Y 




6464 When fc 


Gate A1US0, Inverter 


The LOCAL J 

Kev Is Pressed ^ 


A1 U49 Or AIUSS 



fYES 



f At A1U58 Pin 13 


Ino ^ 


Gates A1U50 Inverter 


6F34Wher\ 

L The LOCAL Key . 




A1 U49 Or A1U58 



Is Pressed 
7 



^ 




The Signature ^ 


N. NO 




/ * \ 
The Signature ^ 


V. NO ^ 


Input Latch A1U51 Or 


Troubleshooting Pro- 

cedure. 




At A1U60 Pin 1 
3818? 






At A1U51 Pin 7 
3AAA? 


^ 9 


Inverter A1 U49. 

















Connect A Clip Lead Be- 
tween The Junction Of 
A1C41 And A1R43 (Pin 1 
Of A1U61I And Chassis 
Ground. 



Buffer A1U60 Or Inverter 
A1U49. 



I 




Do 

All Display 
Segments And 
Decimals Light? 
(See Note 2 For 
A Description 
Of The Display 
Operation.) 



[YES 



Use Schematic No. 10 And 
The Display Signatures 
Table To Troubleshoot 
The Display Circuitry. 



The Display Circuitry Appears To Be 
Working Correctly, However, The Oper- 
ation Of Latch A1 US8 And Output Buf- 
fers A1U59 And U60 Have Not Been 
Checked. 



i 



Go To The HP-IB Trou- 
bleshooting Procedure, 



Figure 8-H-26. Outguard Troubleshooting Procedure Diagram, 
Display Circuitry. 



8-131/8-132 































The following signatures are for the outguard HP-16 circuits. The 
signatures are taken with the start/stop inputs of the signature 
analyzer connected to A3TP4. 



NOTE 



+6V; 79FU 



Pin 


Signature 


U1 1 


0000 


2 


6P52 


4 


6725 


6 


0A1A 


8 


A725 


10 


77H9 


12 


2A3P 


14 


79FU 


c 

10 


3504 


2 


9FF5 


3 


A9F1 


4 


1682 


5 


FF71 


6 


0952 


8 


A8A9 


9 


HI 66 


10 


79FU 


11 


CC75 


12 ' 


79FU 


13 


F2CA 


U3 1 


0000 


2 


79FU 


3 


0000 


4 


79FU 


5 


0000 


6 


79FU 


8 


0000 


9 


79FU 


10 


0000 


11 


79FU 


12 


0000 


13 


79FU 


U4 2 


0000 


3 


F509 


4 


79FU 


5 


0000 


8 


79FU 


9 


0000 


10 


79FU 


11 


F509 


U6 2 


69 H7 


3 


1018 


4 


1018 


5 


HC7A 


6 


HC7A 


7 


A2C5 


9 


67FF 


10 


1P03 


11 


1P03 


12 


CC75 


13 


28PH 


15 


5122 



*To obtain this signature, a 10 K resistor must be 
connected between the S voit TP and the probe tip of 
the signature analyeer. 

To check for proper logic tracer connections verify 
signature of +S V test point Is 79FV. 



Pin 


Signature 


U7 3 


79FU 


4 


79FU 


5 


79FU 


6 


0000 


UB 1 


F609 


2 


CFF6 


3 


9668 


4 


PUA7 


6 


SP30 


6 


27UU 


8 


HI 66 


9 


A8A9 


10 


27UU 


11 


5P30 


12 


79FU 


13 


0000 


U9 2 


27UU 


3 


5P30 


4 


5P30 


5 


7907 


6 


7907 


7 


OOFS 


9 


P6U5 


10 


9U3A 


11 


9U3A 


13 


0952 


IS 


709H 


U10 1 


C5CP 


2 


FF71 


5 


9U3A 


6 


P6U5 


8 


709H 


9 


0952 


12 


925F 


13 


PC93 


U11 1 


79FU 


2 


5P30 


3 


CHC4* 


4 


6C0P* 


5 


9U3A 


6 


A43P* 


7 


F2CA 


9 


8AHS 


10 


A8A9 


11 


129C* 


12 


9H17 


13 


0C93* 


14 


F517* 


15 


C5CP 



Pm 


Sigrtaiure 


U12 2 


F4P2 


3 


CH2H 


4 


CH2H 


5 


2952 


6 


2952 


7 


509H 


9 


P823 


10 


91PF 


11 


91PF 


12 


CC7S 


13 


390F 


14 


390F 


15 


40 F3 


U13 1 


9U3A 


2 


A8A9 


3 


1682 


4 


A8A9 


5 


FF71 


6 


7907 


8 


4FFC 


9 


P6U5 


10 


5P30 


11 


9U3A 


12 


79FU 


13 


9U3A 


U14 1 


OOFS 


2 


9U3A 


3 


9668 


4 


' 7907 


5 


79FU 


6 


OOFS 


8 


PC93 


9 


9H17 


10 


27UU 


11 


SP30 


12 


79FU 


13 


27UU 


U15 1 


0000 


2 


CFF6 


3 


40CF 


6 


0000 


6 


77H9 


8 


2A3P 


9 


4FFC 


11 


; A725 


13 


709H 


U16 1 


79FU 


2 


CFF6 


3 


6P52 


8 


6725 


9 


PC93 


11 


0A1A 


12 


9668 



Pin 


Signature 


U17 1 


1P03 


2 


7F46 


3 


40CF 


4 


HC7A 


5 


7F46 


6 


77H9 


8 


2A3P 


9 


1018 


10 


7F46 


11 


A725 


12 


390F 


13 


7F46 


U18 1 


CH2H 


2 


7F46 


3 


6P52 


4 


CFF6 


5 


0000 


6 


6P03 


8 


6725 


9 


91PF 


11 


0A1A 


12 


2952 


U19 2 


CH2H 


3 


CHC4* 


4 


6C0P* 


5 


2952 


6 


A43P* 


7 


91PF 


9 


88H7 


ID 


390F 


11 


129C* 


U20 2 


1018 


3 


0C93* 


4 


CP65* 


5 


HC7A 


6 


F517* 


7 


1P03 


9 


88H7 


10 


28PH 


11 


6P03* 



Pin 



U26 7 

3 
6 

U32 1 

2 

3 

4 

5 

6 
8 

9 

10 
11 
12 
13 

U39 10 

11 
12 
13 



Sigr^turs 



CP65* 

6AHS 

0952 

Foeo 

U491 

88H7 

U491 

C94U 

0589 

F509 

C94U 

3613 

8AHS 

3613 

F080 

7F46 

0589 

C94U 

F080 




NOTE 1 

The Signature Analyzer controls 
should be set as follows for this test; 

LINE ON (IN) 

START. (IN) 

STOP y(OUT) 

CLOCK. y(OUT) 

HOLD OFF(OUT) 

SELF TEST OFF (OUT) 



+ 5V: 79FU 



^ St^ 






Be Certain That: The Test 
Jumper On The A3 Assem- 
bly is Disconnected, The 
Plug Is Disconnected Prom 
A1J7 And The HP-IB Ad- 
dress Switches Are All Set 
To The "0" Position. Turn 
The Instrument ON. 



I 




Connect The Signature 
Analyzer START And 
STOP Inputs To A3TP4. 
Connect The CLOCK 
Input To A3TP5 And The 
GNO Input To Chassis, 
(See Note t For Signature 
Analyzer Control Settings.l 



I 



1 Use the Signature Analyzer 


1 To Check 


The Signatures 


At The Following Points: 


Location 


Signature 


A1U34 




Pin 2 


6P03 


Pins 


40CF 


Pin 9 


2A3P 


Pin 12 


77H9 


A1U42 




Pin 2 


6P52 


Pin S 


0A1A 


Pin 9 


A726 


Pin 12 


6725 



I 



Check The 


Signatures At I 


The Foilowing Points: I 


Location 


Signature 


A1U18 




Pin 1 


CH2H 


Pin 9 


91PF 


Pin 12 


2952 


A1U17 




Pin 1 


1P03 


Pin 4 


HC7A 


Pin 9 


1018 


Pin 12 


390F 




Are 

The Signatures 
At The Following 
Points Correct? 
A1U19 



Pin 2 


CH2H 


Pin 5 


2952 


Pin 7 


91PF 


Pin 10 


390 F 


A1U20 


Pin 2 


1018 


Pin 5 


HC7A 


Pin 7 


1P03 


Pin 10 


28PH 




f^S 








Latch A1U11 Or Gate 
A1U14. 



Output Letch A1U16, 


yft' The Signature ^ 


SJTES ^ 


Output Suffer 


A1U16. 


Gate AIU14, Or Inverter 


\ At A1U14 Pin 1 




Gate A1U14 Or 


Inverter 


A1U10. 


\qOF8? 




A1U8. 





Bus Transceiver 


A1U9, 


Gate A1U13 Or 


Inverter 


A1U8. 





Output 


Suffer 


A1U15, 


Inverter 


AIU3, 


Gates 


A1U2 0r U14. 





But 


Transceivers 


A1U6 1 


And 


U12 Or Output 6uf- 


fers 


A1U17 And 


U18. 1 




Output Buffer AIU15 Or 
Gate A1U7 Or A1U13. 



Bus 


Transceiver 


A1U9, 


Gate 


A1U13 Or 


Inverter 


A1U10. 





Output Buffer A1U15, 
Inverter A1U10 Or Gates 
A1U2 Or U7. 



^ The Signature 






At A1U15 Pins 1 


K 


Output Buffers A1 U1 5, 


And 5 And 


U18 Letch A1U4 Or 


L A1U18Pin5 

00007 ^ 




Inverters A1 U3, U8. 



Inverter A1U1 Gate A1LI7 
Or Switch A1S1. 



Output 


Buffer 


A1U16, 


Letch 


A1U4, 


Inverter 


A1U3 


Or Gate 


A1U7. 



I 



1 Check The 


Signatures At I 


The Followir>g Points: 1 


Location 


Signature 


A1U9 


Pin 2 


27UU 


Pin 7 


OOFS 


Pin 9 


P6U5 


Pin 15 


709H 




Check The 


Signatures At 


1 The Following Points; 


Locat ion 


Signature 


; A1U6 


Pin2 


69H7 


Pin 7 


A2C5 


Pin 9 


67FF 


Pin IS 


5122 



Yyes 


These ^ 


\N0 J 




Signatures 




Bus Transceiver A1U6. 




^■^Coffect?/ 







lYES 



I Check The 


Signatures At 


The Following Points: 


Location 


Signature 


I A1U12 


Pin 2 


F4P2 


Pin 7 


509H 


Pin 9 


P823 


Pin 15 


40F3 



♦ 


These ^ 






Latch A1U11 Or Inverter 
A1U8. 


Signatures 
Correct? ^ 


Bus Transceiver A1U12 









lYES 



Use A Clip Lead To Short 
The IFC Input IJ3 Pin 9) 
To Chassis Ground. 



3455 - 0-22 




Output 


Buffer 


A1U16, 


Latch 


A1U4, 


Inverter 


A1U3, 


Or Gate 


A1U7. 



1 



Use The Clip Lead To 
Short The ATN Input (J3 
Pin 111 To Chassis Ground. 




Inverter A1U3 Or Output 
Buffer A1U16. 



Use The Clip Lead To 
Short The REN Input U2 
Pin 16) To Chassis 
Ground. 




Inverter A1U3 Or Output 
Buffer A1U15. 



Connect The Signature 
Analyzer Probe To A1U16 
Pin 5. 



Does 
The Probe 
Tip Blink 
When The 
Ground Is 
Removed 
From The 
^REN Inpu^ 

f^S 



The HP-IB Circuitry Appears To Be 
Working Correctly. If The Problem Still 
Exists: Check To Be Certain That The 
Proper Procedures linguard Or Out- 
guard) Have Been Performed. Trouble- 
shoot The ROM And Page Select Cir- 
cuitry On The A3 Assembly And The 
Circuits Listed In The Troubleshooting 
Procedures Which Have Not Been 
Thoroughly Checked. 



Output Suffer A1U1B, 
Latch A1U4, Inverters 
A1U3 And AlUBOr A1C1 
And A1R11. 



Figure 8-H-27 Outguard Troubleshooting Procedure Diagram. 
HP-IB Circuitry. 



8-133/8-134 






































^VlRAGE ftESPONCCNC 



VRMS FULL SCAtC 



CONVERTER 



VOLT$/av 

240 



^JLi f*>.F *6»«6efv«e 



IVOMS fJLL 



A/0 WAVEFORM 



SCAce OUTPUT 



^sfSCTWM 



AUTO -CAL 

H|Q»* REOOLUnOV 



OUTGUARO MOTFCA BOARD 



aTH O^F 

lOVAC APPLIED TO THC IRPUT 



A/0 COKVEffTER 



INCUARD m6Th?R 



AVPLT L»f 

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CbOSCO ON ,lVtfc 



MAIN CONTROLLER 



CATWOL L»NC$ 



NPjr a 



»T€CRATO« 
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OC PPIAI^ 
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ao^? ON loovAc 

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SwrCM AiAl 

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DISH. Ay 



F»CU 

^Wl^ 

ONN£ 

r f .as 



s«fi> 

ORiVl 

CACJ^fS 



P(L‘..-w«r»' 

DATA »r 



ON 

? «<-i Kd 
A 4 «/IA| 

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3 f IfAl mu. 

ATTLs^^rr* 



»«in> 

DN.VE 



AAV* 
C^WlT 
TAU »'? 1 T 



1 COWJECTOR 



IPLAR PANEL! 



»7mA 

UiK iOOKA) 
• /wA 

I 'MO .lOWOI 



iMVENTgR 



CORV RIGHT I97G &X HEWLETT- PACKARD COMPANY 






Figure 8-H-28. Detailed Block Diagram. 

8-135 



(»^/7 


PKPUT 


• ' 1 1 

T ABSOLUTE 


S 0 U 4 P 


■ > 

T . 


(see 1 Ml 


isec PARA P-A 2 ) 


lACe A*RA «- 53 } 


(Set PAAA il-NI 


♦ • AKf^TliR 

t-rr AAA 4 ■ 9 »i 



lUPliT 


COWCRTtR 


w Aioi>t£p a 

I , ritrEn 


_ KfiJ 


ATTSNJATOR 
uce AMA » «01 


1 Ote PAItA »Al| 


• AUPlIFiEA 


• AI4PUIFIER 
VeC AAAA • AAI 





















Section VIII 



Model 3435A 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


Aitf 


i>J A!>»-d6S10 


1 


A»s^fcM»iT» im;u >W 


2AAP0 


034$>'665L9 


AIXI 


0T6O-4470 


1 


CAFAOTOR.FXO 220PF *-10% 


28480 


0180-4479 


«iJC4 


oipj-2c»r 


A 


CAPACITuA-Fav UPK ♦>»< jgjaVdC 


^M0 


4160-2287 


AlwLi 


gi6«^3v9ft 


A 


CgPAkifUA^FXO lOiiPA *-lg« CtH 


2AAo3 


0169-3464 


AC 


JiAO-ill»9 


2 


LAPACiruit-i^xD 68i)gpf »-iiJ4 dOg voc PUivi 


28480 


0160-01 B8 


A|J4.> 


Ot AiiKtiiM 


1 


CfcPACi rUA-FXU «gOPF .aW&llVuC HlLA 


2ACC9 


0160-01 34 


A4UVU 


MlVJ-Ml 




CaPACI rUR-FAU Agogp «->< UOJ..VX UK 


2»4fr0 


0130-0071 


AIUC7 






CAPAv<tUA>PXD AguPF iggggViiC ktK 


28AB0 


OI30-0071 


AiUt» 


gi ju- 


13 


UPAClfOA-PKD 39VgC TA 


962 A» 


15001 OS X9089A2 








UPACJTUR^FXO 10F^20« <A 


36282 


15001 OS A90S9A2 


AiJUii 




i 


UPACltuH-fAO J30F^tg« lOVX lA 


S62P2 


1S0D336X901032 


AivUlA 




4 


gAPACitUA-PXO ia» 2>aVO^ 


2AAA9 


0169-0127 


AIJLa^ 


glA»>-a«66 




caPAC 1 TOA-FAt) lOQPF »-|J4 tvgg»Vgw ttK 


26449 


0160-3466 


A4JCIA 


g L«AKj«o«i 




LAPACITUR'F *g IJOPF f-lOS lUdakFM, CtP 


264A0 


0169-3466 


Al«^Vi> 


Jl94>*2iU« 


« 


CAPAU<Ult-FXg 47PF iggetFlH. NUA 


26480 


0l60-230e 


AlwCito 




1 


CAPAUtUK-rxO V7P»- A-V« ^OUlVU. 4ICA 


72ii6 


UM13F A7OJ0590MV1C4 


Aiau/ 






CAPALi CUM*Fxg iggPF iggaViX hica 


26640 


0160-2204 


AiauiA 


J| 




4.apa;i iur^fau iaFw04 sgggu fA 


8o26V 


1500IOSXOOS9A2 


AiJLiV 


giat>*u^ja 




CAPACI FuH-Fxi; igr»>ggt ^D«gb ta 


S62»9 


1500I0SX90S9A2 


Aiaudt 


glAO*«AAl 


X 


C«.PA»IT(>A>FAU l3(iPF IggieVsHi PUVP 


2«489 


OUO-4461 




JibA>-^a.^r 




UPAvIIuR-FaO IvPF ♦->« ^JPaVUC CtK 


28489 


0160-22S7 


AAkJUi 






gAPAtlTuR-FAb ggOUPf »-l0* 20J«Vl)C PUtVC 


>6249 


202P22292 


Atuw<A 


gi«<^23l>o 




cAPAiiHOH-FAg grpp igo«vgw ni«.A 


28489 


0160-2J06 


AiUw^> 


gie«>-vl9j 


1 


UPAwl lUK'FxJ «AAOPA*gg4 A9VgC lA 


So289 


1509334X903562 






J 


^.APAvl rOA-FAg avlgp eigO'wA sgsVJ^. (.Ah 


26489 


0U0-S447 


AAJL2/ 


gt ww^iuA f 




wapaCI Ftift-F XI# .Jigf •lgg-g» >g««gt uap 


28469 


0160-3447 


AiVb«» 


giMV-wAr*! 




vAPAiat TOA-Faw |guF*-ig4 &g<g« tA 


>0249 


l500l0oX902092 


AWUv 


vft 


t > 


caPauiqa*fau aJigp ♦hj-a^x igOstfui. C(k 


24440 


0160*2955 


AUg^4l 






W»PAcirUK-FAU aJlJF AgW-Ail* igOAVUi. C6A 


26449 


0160- 20SS 


AlJLJtf 


gi 




waPaCIISK-FaU lgF*-gj< >gvgc fA 


>6249 


I5V0105K0050A2 




J 




C.PALl?UR-FAg .glgr AlOg-w. ^UNVub UP 


26449 


0169-1647 


Al.4bi« 


g|4H>*gfcig 




CaPACl riJM-FAU |UFW3i 9gvgC FA 


>6249 


150010>X005942 


Ali>0> 






CAPAClfUA*fAU .OigF *dg-gy« |yO*v«N. CCA 


264*0 


Ul60*29S5 


Aik)^>A 






c^palUjk-fao .oiJF ••«NAg4 ugggu cu 


2«449 


0160-2055 


A|gwi7 






CAPACI ijk-fau .gigF •hj-2P« IPUaVul ctn 


2d489 


0U0-29S5 


AAi>V>A 


giuH2w»> 




C•PAC|t^)A-Fxg «ai<JF »bg*204 IOCaPUC btA 


24440 ' 


0160-2055 




g i M*2u>> 




CAPACItifK-FA.^ .UlJf ♦i.J-ggi iJUkfUC UK 


24440 


0160*2055 


AlUwAt 






CapacMum-Faw .uit>F ;oO«yi>L cfA 


2o440 


0160*2055 


AIWw«^ 






CAKACI lOH-FXg .aluf PpJ-«W« iguKPM C(A 


26449 


OU9-205X 


AiU^«» 






CaPACi IUM-F4b mvlJf •«g*gy< igOpVDC CCA 


264 49 


0169-2955 


AlOwAA 


U|ol|-g^u» 




CoPAUVUK-FAv UgPF *-lMA lyjguVJC CkK I 


2C440 


0160* 3466 


AUc«> 


gi Ar-(^.:>3 




*.«pa:itok-fau iuF»«2g4 >uvgc fa I 


>6269 


I5u0l05 X90> 942 


A10CA9 


J&«AHbtoaig 


1 


CAPACI lUH-FAg igJf 4-U . l^VUC U 


H249 


1590336X901082 


AlUtA/ 






capaci fOK-FAii .uigA ♦s.g-^pc iPUiivu. ua ; 


24460 


0l6O*20S> 


AiJtA« 


ai «g^«g> i 




C«PACatuK-FAU «ylgp •Ay^VA ivOAKCC ClA 


26409 


0160-2055 


AlUCAV 






CAPAul laK-Mt) .glslF igg*VM. CkH 


24««0 


01«0-20S> 



ac SERIAL NUMacRSienAOISOeANOAMVE: REPLACES Olt&OIS* 



J L 



8-136 















Model 345SA 



Section VIII 



Replaceable Parts 



Reference 

Desigrtation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 








CAPACitOH-PAO •OlvA lUOkVUC CtA 


2B4B0 


0180-2059 




\i i C^«oJ) 




&APACIIUR-PXU *0201 PAO^^OC A9kVOb b«K 


26 *ia 


0180-2605 








CAPACifOfc'PAn .OAOP *6W-A0I A90VIK Lia 


2d489 


U180-2804 


A|UL»A 






b*PACIl0A-pAU 10F*-<0« bOVJb fA 


V6269 


1500 105X009 9 A2 




a4 




CAPAC JfUA-fXo lUF AxVOv bCk 


Z*4B0 


01A0-0IE7 


A4«w>m 


iJl %«3>U,iU 




C-PaCI SOH- rAO IOF4-204 >0«>C |A 


94Z«9 


15001 D5X005JAZ 


A4o«.>/ 




/ 


LAPA£I luA'PXO SUVUC Al 


28410 


01BQ-Z628 




Ji «i>as>a4 




k»P*UIUH-FXi} SilVuC <c 


Z4480 


0180-2820 


*4 


04 AJ- 




CA^kU lUk-l-XU iuk«-^u> J<3M lA 


»b2a« 


1501)105X005082 


AUg«»A 






bAPAClfOH-FXJ IOOOOF*>0'40« ^sVuC AL 


002ZO 


25VB5UOOO 


A4>ih>«W 






CAPAblTJA-PXO 40UUJPA9rf-4u« ^>VOL A4 


002ZJ 


ESV6SLIOOO 


AiguftA 


Jl«kHW4:iJ 




kAAALIIOA-AAU 1 i;F«-^W. tA 


Vb28) 


1500)05X005082 


A|ugb> 


J4 vO*(A.V> 


1 


CAPAC (fUk-PXU A^OOJF PlOJ-lUe I4VJC AL 


20460 


0180-0895 


AiJLOv 


04 




cavacmuii-fa;. tJF»-xa; >o«ja ia 


SoEal 


I500105X0050A2 


AiJUU 




t 


Uiuje-ut« fAP IVV ^»MA lU-I^ 


2<i*sO 


1601-0666 


AiJbH^ 


49«^l-0»Jv 




blUilC-MN PkP MV tint lu-l/ 


2B4«0 


I60I-0S6B 


AlJUii 


4VU:-4iO*> 


z 


4>lJUe*2*«A »*A&V uO*7 PO»«e« IC**.J|A4 


I98IS 


CO )58>4 




4VU-OA40 




UIUOl~S«ltCHJ«» AOV ^jJAA 0U«? 


2B4B0 


1901-0053 


AUCK> 


49bl«Uw7tf 




OlJj£*>wnCi«|Nb FJV ^wjkA «4i» iM'f 


Z8480 


1601-0060 


A40uk* 


lSw4'* OJjJ 




l)IU3A-MiI(.MI>M SJV juMA V.lS UJ-) 


2B480 


1901-0050 


Al«tUK/ 


iyO(-uta« 


> 


UIJ3E-INK 16.AV >t Ul>-r PN'.AM IC-«.dB>A 


d*7t) 


il 10939-242 


Al^^UKw 


49ti4«‘Oa>J 




blJJC-MlU.nl'a. AdV 2(iJ«A <«> dij-r 


26AV0 


1901-0050 


AluCHf 


tyi^-ut4< 




Ula3A-ANK 1..AV it tlU-f P'Ja.AB IC>«aObAA 


0471A 


32 10939-242 


AUCKU 


49 W0*9b 




OlOOfc'iNK 4«.^V S« 00-7 P.l*.%« Tt*««0eA4 


0474J 


U 10666-242 


AI«ICMI^ 


49C4-OCJO 




Uid>E-MllfcHl'«« AdV AlOMA lAl-7 


Z8480 


1601-0060 


A4tfCHi> 


19U-00>0 




UlUUE-SHlICHiNb «OV ZVJ^A AN> UO-f 


2B4B0 


1901-0060 


A4tl«.H4^ 


IVU«40U2 


4 


OIUOE-ZMM P.A7V »% 04>*7 Pg*.9fl IC*«*074 a 


16616 


CD 35526 


Al«fVK4> 


i9U-ogAV 




UIOJE-ZNR B. IVV St OlB-r Pd*.*a ICo-d^A*. 


284S0 


1902-0049 




I9gi-0v>j 




Ui33E-SAIII.nU. AOV -dUMA iHi dJ-7 


28480 


1901-0050 


M>>CkU 


49€4-0o$0 




UlUJE-SallChlNb «av 2U0>U ANS 00-7 


28480 


1901-0350 


AWC449 


|VC4-0^A» 




OiaOt-&fch PAP MV Z5HA lw-7i 


28480 


1901-0588 


AljCftiV 






DlOdE-GEN PKf AdV 2»U lu-72 


284 BO 


1901-0508 


Ai«|(.K^l 


4901-wVO j 




OiaoC-OeN PKP MV Z9kA lj-72 


28400 


1901-D588 


AivCK£^ 


t9Ql-0»06 




OIODE-OEN PkP 3dV 2S>«« 10-72 


28480 


1901-0508 


aijLN^j 


i90i*go>o 




OIUdE-AMirCtU-vC AdV 2U0HA 7Ni UU-7 


2B400 


1901-0350 


Ai^cM^V 


l9Cl-0t/>0 




U| J0£-4kITCHl)M 60V Z^OMA ZK> 0i>*7 


28480 


1901-0090 


A40CH^> 


49U-gj9tJ 




010dE-Slliri.HlNC aov AOgNA 2N& DO-7 


28480 


1901-0050 


*Ul.k4> 


IVOi'OO^O 




OIJJE-SallCHlNO «0V 2djHA 2h> OU-I 


28480 


1901-0050 


AIJLK^/ 


4901-09^1# 


♦ 


0|00(-OtN HKP 49 V »OHA 00-7 


28480 


1601-0176 


AUUA<« 


19C4-U9/A 




OlOJk-OAN PkP AsV 90HA 00-/ 


28480 


1601-02 76 


Aii;u<U« 


49Q»-aitt'» 




OIQOA-iNA 4«*«ZV 9X 4>0-7 PlM«9a TC«*»OAAX 


3A711 


S2 I0636'242 


A1«>M*4 


490^*014* 




DJUJA-ZNK 40*ZV 94 00-7 P0*«4a I4.«»«066< 


OA7I6 


ii 10669-242 


Al^UKX 


4904'00>J 




01 JJE-S«nAN|NG tfOV 2UUM 2Ni OU-7 


28489 


1601-0090 


AIjC4»> 


tVCl-Oo^O 




dIUdE-MlItHINO adv AddHA 2N> Od-7 


20480 


1901-0050 




>ya-ou»j 




bIdJt-SBiKHINb Bdv AddOA 2NS dO-7 


28460 


1901-0050 


A4JtHi» 


I90i«uu9g 




OIdjE-SdIIbHIHC AOV 2dOHA 7NS Od-T 


20480 


1601-0090 


AlUCuie 


|9C4-0Ni9d 




Ul JAE-tdllCHIMd «av 2UUHA ENA dO-l 


2B480 


16U1-0090 


AlOUk^f 


19U«00»0 




01 jJC-SHniMJNC Aov Zoom zns oi>*r 


28480 


1601-0090 


AlOtHiA 


|yg|«OV>0 




0lD0l-9«l1CMtNo Aov 200MA ZN& 00-7 


28480 


1901-0050 


A40t.KJ^ 


19C1-0U9J 




dldOE-SdUCHlBC «dV EddHA eN> gu-7 


28480 


1901-0050 


AtUCHAl 


i«ci-ouyj 




dlUdE-tdllCHInC IdV EddKA ENt dU-I 


28480 


1901-0050 


A 4I^CAA^ 


490I-OW9U 




OI3dE-tl>n<.>1|Ni> l(iV EdSHA ENS OU-7 


28480 


1901-0050 


A4«I4.HAA 


i9Cl«iM>0 




OIUJE-SalTCMINC 60V EUdnA ENS 00-7 


28480 


1601-0090 


AlaCA4« 


|904*0s»0 




OIOO€-$W1TCHINC AOV ZOOM iHi OU-7 


28480 


1901-0050 


A4UCH49 


iyei-oo>u 




diadE-SBlTLHtHC 6dV EudXA ENi Ob-7 


28460 


1601-0090 


AltfCHA* 


l9CI-0«»o 




UlUUE-SHITCHlW. 4dV E3dHA EHE OU-I 


28480 


1901-0050 


Mi>kl4/ 


49Cl*0w>J 




0I0J£-SVJTCH1NC BOV Z09M 00-7 


28480 


1601-0090 


41JCK*a 


i90i*0v«» 




OIUO€-P*A Ak^T 400V 790HA 0U-Z9 


28480 


1601-0026 


A1JCK«9 


1904-Ou^tt 




0J09£-PhA MtCT 400V 790MA 0(^«V 


20480 


1901-0028 


Ai«lLH>4 


49€4*OUJA 




UiUOE-Paa KEbI *OdV ESdHA dO-E9 


28480 


1901-0028 


Aii;CK>A 


|9CI«OwAA 




OlUOfe-PvA xeci 40«JV 790MA 00-79 


28480 


1601-0026 


A19CN» 


49U-Ov29 




OlOOE-PKt UU AOdV IbOHA dU-E6 


26460 


1901-0028 




|9€|*00^U 




QJOOC-PWA AkCT 400V 799f*A 00-Z9 


28480 


1601-0026 


A4aCK9^ 


49 0l-4Kf^A 




DIOdE-P«« RcCI AdOV 7>dHA UU-EV 


26480 


1601-0026 


Aiauofr 


49C4-ua^» 




UldOE-PuR NECI «00V TSAHA dO-EV 


E84V0 


1901-0028 


AiUCHtI 


I9U-0v4a 




OJOOE-PllA AtCf 400V 7$0MA 00-79 


26460 


1601-0026 


A4aCK^A 


49Ci- 0o2i 




OlOOk-*AMA laCf 40UV /UOM 00-Z9 


Z8480 


1901-0328 


niauw 


4VC4«0v>0 




UI00£-SmIICH1NC BOV ZOOM ZNS OU-7 


28460 


1901-0050 




I902-0UA9 




OlOdE-iNR s.tvv kt OU-7 Pd*. AM IC«*.dE2t 


26410 


1902-0049 


AidUHX 


49Cl‘*V^O0 




dlOOE-RMl REEI lOOV l.SA 


0471) 


SA1B4^9 


A4«jCa»> 


4VC4‘>OAOJ 




01006-FVA ALCf 400V i«9A 


04711 


SA1848-9 


A40CA»A 


l%0i-0l7i. 




dl3dt-2NI> A7.»« Sa OU-IS PU-ld ICBa.dAI* 


0471) 


8£-U2li-3l5 


Aisll»AO> 


|9 0^UW99 




OlOOS-ZAA 4*i>V 91 i>4>-7 Pu*»4« TC**«OZZX 


22480 


1902-0046 


AiUbftAb 


t9w-o»r» 




OX90fc*ZKK 47«9V 94 00-49 PO*J» H**«0Bi4 


0471) 


92-1121 )-9>5 



8-137 
















Section VIII 



Mode! 345SA 



Replaceable Parts 



Reference i 
Designation 


HP Part 
Number 


Qty ' 


Description 


Mfr 

Code 


Mfr Part Number 


AiULM»/ 


l9Q2*31d4 




0I03E-2NK 3.42V 68 00-7 R0-.48 IC-*.BI8X 


isns 


CO 39034 


AiUC«*« 


190^0031 




0Un-2.9R iHWli 14V »A AD«9m TCBA75t 


04713 


1N63618 


AlaLN»> ' 


IvOi^Owag 




OlOOE-SOllOnlM. SUV 2O0HA 2NS UO-7 


20490 


1901-0090 


AtOCII71.na 


IMt-OOtO 




DlOQC-SWITCHIM 60V TODMA 3746 00-7 


38460 


1001-0060 


AlJfei 


ivT^ogf? 


1 


• »UA6c V aTCU 


28480 


1970*0077 


AIsfU 


■ Ii 0 -Ou »2 


1 


HUfc*^REb 26<8Hjm/ft .Ol-DJA 


20400 


8110-0062 




12SI-2USS 




ClAMECtOA'PC LUGE l4-CUNf/KlM 2-iU)«A 


71786 


262-16-30-300 








CUNMEcroA-K EvOE t6-«UNI/tu8 2-ROaS 


71709 


262-16- 30-300 


Ai(>J) 


mi-4iw 


1 


LUMNEUOA-PC EDOE 16-C074T/R0W2R0WS 






AUJ« 


12it-02> 


1 


cuvaicruR iv^iN n posr I'fPi 


20407 


1261-4326 


Aigj> 




i 


CUNHEOTOli 4-RlN H RUSI ITRt 


27244 


09-60-103112*03-0381 


AiUKl 


gA W>'g7«l» 


1 


RLLAVtMAO 


28480 


0490-0740 


AiOAd 


»)49t^0o«3 


11 


■ElAV-REEU lA tOORA lODOVuL 6V0C-CU1L 


20400 


0490-0603 


AigAA 


OA4t>«0<*«3 




RtLAV-RElO 11 lOORA luOOVOO 6VOC-(.OIl 


28480 


049^ 0603 


AIlM* 


g4«HUbA4 


% 


A«lAV-«C(0 iA lOOM 2SUV0C SViK-COtL 


29400 


049^0004 




D«9IH0iAA3 




MLAV-Ueo li lOORA lOOUVX 6VOC-COU 


20400 


0490-0063 




gA90-0»A} 




fUlAV-A£€0 lA iOOHA iOdOVOw 9V0C-C01L 


28480 


0*90-0663 


AitW7 


U4 9fKgA44 




*tlAV-«EEV lA lOORA 260VDO 6VUC-C0IL 


20400 


0490-0004 


A LUKA 


0491^0604 




RCIAV-MED lA lOORA 260VUC 6V0C-C0K 


20400 


0490*0004 


AiOKV 1 


U49i^04O4 




A€AAY-AA(0 iA lOONA 2MVgC SVOC*>CUlL 


20400 


0490-0604 


AlOtl 1 


910KU41 


1 


COIL-NLD 2 40 IX >8 U«46 .16308.47610 


2422A 


16/243 


AIV1 


mi>43ii 


1 


CONNECTOR 6-RIN F R06T TYRE 


27364 


23-01-3061 




I2S1-34TS 




CONTACT-CONN U/W ROST TYRE FEW CRR (R/OP11 


26460 


1261-3876 


A10T3 


1261-4310 


1 


CONNECTOR 2-RIN F POST TYRE 


37384 


22-01- 1031 


AiOwl 


30(^2028 


4 


tKANSlsrUR, flT 


28480 


9000-7026 


Algw 


>0i«*702S 




thansistur. fei 


20400 


6080- T038 


AIUIM 


SOet-7047 


9 


IRANSISTM. FET KUVAR37 34U06 


30480 


6061-7087 


AIJU4 


60ef-7O47 




iKANSlSrCMi f€T KOVAHaF Sid09 


26400 


5081-7047 


Aig4»» 


i«9»*Oioa 


1 


tAAN91SlUR-j7Ct DUAL N-CHAN O^HUOt SI 


20400 


1699*0300 


Aiog» 


1AS^0«47 


t 


TR4NSiSI0A-JFET OUAl N-CHAN O-NOUE TO-TI 


20400 


1699*0247 


Aiuw; 


IA94-0071 


13 


TKANSISTOCI NRN SI FD-400M4 Ft-200RH2 


28480 


1094-0071 


Aigyd 


1433-IXM»» 


k 


fMAHSlSfOA PV SI PO-JIUMM PT»47>Mh2 


20400 


1093*0006 


AIJW9 1 


i91»-0020 




THANSlStOA PNR 61 RO-430R8 Fr-lsDMHl 


20460 


1093-0020 


Aiww4i 1 


l«SA-<UI71 




rPANSISrOR HPn si Pt^lOgM Fr«200MH2 


26400 


1854-0071 


AIUwIa 


1834-0087 


y 


TAAVStSTOR t%PH SI P0«i4OH«i Fr«7SNH2 


20400 


1864-0087 


Aiawi> 


>0A«-7wiA 




TKANSISTM* FkT 


20400 


6088-7028 


AiugiA 


50aA-7024 




fKAHSISIOAe FET 


2848U 


9000-7026 


Alggi> 


6061-7047 




laA9SISI0K« FEI KOVAKSF SSOOS 


20400 


6061-7017 


Aiugio 


6061-7047 




TKANSlSTlM* FET KOVAKsF SSOOS 


20400 


6061-7087 


AlUbif 


109^0^44 


i 


rkANSISrtK-4Ftl DUAL N-U4AM U-MJOE TO-Tl 


20400 


1699*0746 


AiawiA 


6061-7047 




TKANSISTOAe FET KOVAKSF SMO> 


28480 


5061-7087 


Aiggiy 


6061-7047 




TKAHStSTCM* FAt KOVAASF SiOOS 


20400 


6061-7087 


AAiM^i 


6061-7047 




IXAVSISIllA. FET KUVARSF 6^03 


20400 


6061-7087 


A10U« 


1873-0420 


11 


TAANSISrOK 2N4S91 NKHAN O-HOgE 


04713 


3N4391 


Aigg^i 


1834-0087 




T84N61ST0K NRN SI F(M440H» Fr*r6RHZ 


28480 


1094-0067 


AtJ«2* 


l»94-007l 




IKANSUTOR NPN SI PU»IOOI«M Fr«200MH2 


20400 


1864-0071 


Aigg^» 


lsM-0071 




f«aNSlSTOa NPN SI PD-SOOMi FT«200»»U 


28480 


1854-0071 


Aijgdo 


1«S3*0W0 




TKAMSlSm PNP al PD«>OU>lil Ff*lS0MH2 


20400 


1853-0020 


AtUiMT 


1«S4^A6A 


4 


IKAN818I0R 4-417 N-CHIN O-RQOE 7(7-72 81 


20400 


1099*0300 


Aiog^i 


1866-0448 




T4tNSI8I(JR J-41I N-CHA8 O-RUOl 10-72 SI 


28480 


1699*0300 


AiOg^v 


1853-0468 




IRANSISIU* J-FE7 IXCMAN U-RUOE TD-72 SI 


28480 


1855-0348 


AltftMl 


1439- 024« 


2 


• lAANSISIOR. 4FE7 N-CHANHEl 2N4837 


20400 


1099*0244 


•logAA 


1863-0244 




• IAAN8ISI0M. 4FET IT-CnANNEl 1N4867 


28480 


1855-0244 


Aijgaa 


IAS9«g42a 




iMANSISTOa 2-^47 2f«4i9i N-CKAN O-MUOE 


04711 


2N4391 


Algg»4 


4099- 042U 




I88NS1SIUA J-Fll 2N4391 H-CHAN |7-R«7U1 


0*713 


2N4391 


Aig«i> 


18 66-0448 




TmANSUIO* 4-4ET H-CRAH 0-R004 70- 72 SI 


28480 


1855-0348 


AtUWIo 






TkANSISTOP J-fET N-CHAK D-AOOt T(H72 SI 


20460 


1865-0348 


AiggAf 


l«3>'024(» 




T<u.vsisra*-44ir oual n-ohav »-ru<k 7o-ti 


28480 


1856-0248 


AiUOAA 


6061-7047 




lAANSISTGlPa FbT AJVAHSF SSOOS 


20400 


5061-7087 


Ai0gAA 


6061-7047 




tKAVSISrUR. ftl KUVARIF 64003 


20400 


6061-7087 




46S9-OA40 




IhANSISTUA 0-FET N-CnAN (7-RU4C tU-72 SI 


28480 


1866-0348 


AlOlHl 






TaAASISTOA PNP si P4MA0OIU FT«lSi>fM2 


20400 


1093*0020 


AiiNAd 


1466-0020 




lAANSiSIOR RNR SI RiXSUURa F7-130RN2 


20400 


1853-0020 


AlUtfAi 






iKAMSISfOH PNP SJ PO-iUOH« M«IS0HN2 


20400 


1853-0020 


AiggAA 


1864- Oo7l 




TiiANSlSTUa NPH SI PO^jJOf^si FT«2adPH2 


20400 


1834-0071 


Aig«r«» 


1864-0071 




|4AN<IS70H RPN 61 R0-4l>0na fI.200RH2 


26400 


1864-MTl 


Aigg«.* 


1864-0040 




IV.ANSISruR FNR SI RD«40«H8 ET-160Rn2 


20410 


1863-0020 


A&gMi 




2 


AkSIsTA 90R SA U pH IC«DP-20 


01637 


OS-9 


Aig«u 


J«u-gg 




HESJSllJh SUA SS 9H PH TC««H~20 


91637 


RS-6 


AlOKi 


g69d-A7.»l 


u 


AtSlSIOA ItfOK >4 •2SB CC rC-*400/*990 


01121 


081046 


Aign« 


08$8-873r 




■litSIOR 1008 6* .238 CC IC<-4d0/4800 


01121 


C81046 


Algo 


goaA-4>3» 


4 


fU.SlS7W 19A >S «2SH FC rC*-400244(M 


01121 


tOl 636 




0844- 244S 


2 


HbSJSlUR 240K 34 •23H H TC«*HM/«9dg 


01121 


C02449 


AiaH7 


04d>-444> 




K-SISICM 2408 64 .264 Ft 1C— 800/*900 


01121 


082446 


AAgno 


U7 37-’0^4A 


2 


RLSIilOR 168 14 .1238 f IC-04-100 


2494S 


C4-1/8-T0-1502-F 


AiJHV 


g7>7-044» 




H^SIaIUP iSK 14 «129 h F ?(.•»»• 100 


24946 


C4-1/8-T0-1602-F 


A1»HU AC 


04 85-I326 


9 


RlalSiOR IJK >< .268 Ft It— 400/*700 


O1607 


C81326 


AC SERIAL NUMBERS 


1622AOI806 AND ABOV 


E: RERLAt 


:ES 0863-3036 







L 



A 04OMCR71 •fdCn77W0«ve«'lvte 

8-138 














Model 34S5A 



Section VIII 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 






1 


aaSISrOK ).3K S« .ZSh fC IC*-bUl)/*70U 


01124 


C93325 


klOKU 


uovftur 




Hc)l$(Cn 400A bS .2&0 Cl. fC«-900/»MO 


04424 


COIObS 




J603*t0L> 


2 


aisurut 100 st .asa fl 7i*-«oo7*soo 


01121 


C94049 






1 


■UalSICM 8.ZK S« .ZSb Fb rc>-*00/«100 


OllZl 


C88ZZS 


AlVHio 


i>»W*4»9> 




XSISIQH IM li .ZSa F( tc*-*00/*«O0 


oim 


C915iS 


AiUKi/ 


0o4WV>> 


a 


(bSISIIW ZUK a« .zsa FC t(.>-4dO/>DOO 


OUZl 


C92035 


Aijhi* 


d6M*447y 


2 


ACSISIUK 1*K 14 .12S* F H-Oa-lOO 


Z4S4S 


C*-178*rO-l SOZ-F 




i)b«S-3iae 


1 


RH>i$l(M 47.0 a 40 •14'>* f 7C*i)»-400 


Z4S4S 


Cb-178-ra-178Z-F 


AIOIUI 


t(biO>»»2» 


i 


UsISIUH s.aa at .ZSa Ft TC»400/>ro0 


01424 


CbSbZS 


AlJK^lc 






iUSISIW S.«K St .ZSM FC rCa-«o0/FT00 


OtlZl 


CBS8ZS 


AIJH^J 


0»«>»4>J» 




MStSlOH 1st S( .2S. FC U— «00/«b00 


OllZl 


C81S3S 


AtJlU* 


J6M-A77r 


■ 


AfeSUIW* FAD 4000 UHM •U> 


20MO 


0898-8777 


AiOlU> 


t)69«-AA79 




MttlSIUI tbt U .izsa F IC*0*-ldU 


24945 


C4-120-T0-I402-F 


AliJiUB 


06(0-1029 


1 


KcSISIOt l.bl St .ZSM FC ILa*«00F«Z00 


01121 


C818ZS 


AiJ«27 






McSiSIU* ZZO St .ZSa FC tCa-bOO/aaOO 


OllZl 


C8221S 


A 


J6IO-9409 


7 


•atlSIUK Slot St .Zsa FC tc— 4UO/FOOO 


OllZl 


C9514S 


A4^R£4 


i>AW-ar*i 




KcSUrA iOOK 9« .260 TC—400/*b00 


04424 


C8I04S 


AiJKJt 


O6tt>-4oi» 


IS 


Ktsism lot St .ZSa FC rc— 4UO/*700 


OllZl 


t6i035 




jaa3-»a/!> 




XSISlOa S.at St .ZSa FC 1C— 4007*700 


OllZl 


C95925 


AliW^i 


J60i-9il» 


4 


aesisio* 410 S( .Zsa FC IC*-4dO/*600 


01421 


csoiis 


A4jA>A 


U«W-S/iT 




Re6l$tQH 400R bX .29lr CC rL«-400/»000 


01121 


C8I04S 






1 


USISlUt 7b. 0 11 la PH IC-0*-20 


9ISS7 


■ S-lt 


AUkJ« 


0*9(4-0/76 


4 


• A£SliTOH« Fh> 40 UHH «06 


29400 


0898-8778 


AlUKi/ 


06«>-2d)6 




KtSIStO* ZUK St .zsa FC ft— 400/*b0U 


OllZl 


C92035 


AiJHd» 


•ivM-ai?} 




AC$|$tgRt FAD 4000 UHH .US 


29490 


0848-8777 


AlOH)^ 


Oo9(i-I7i7 




RFSISU* 400K Si *290 CC rc«-400/«d00 


04421 


C8108S 


A4J»Ai 


a*99-Oo9i 




MSItlOR ZOt It .izsa F rc-UF-ZS 


OS080 


ARE 555 


A4jR*£ 


069»-0«y2 


4 


AkSlSIQB UOR 4S mlibn F 71«0^-2> 


09999 


PRC55S 


AiaA«> 


U«90-«*93 




tesISIOR ZW It .IZSa F IL>0*-ZS 


03996 


PH655S 


AitM«4 


joM-erir 




A£SISf(« lOOR bt .260 Cb 7C— 400/9$00 


OU24 


CBIObS 


A4JR«> 


06l)-6l99 


i 


U^ISfA 9lK bt *2Sm fC Tv*-4*IO/daOO 


04121 


C8SI3S 


A4JMA» 


0O90-6777 




AeViSim* FkD 4000 OhA .il» 


29485 


0898-8777 


AidH«/ 


U8U-34B1 




ACSIbllVE SE1. lon/IOCKOHM (INCLUDES R63I 


29490 


0911-34*1 


AiaM* 


141U-U>.>2 


2 


H£T«OAA-HLb 8-PlN-SlP «4-PJN-»PC(» 7X100K 


Sbzas 


246CK104X9PR 


AiJH^v 






Nc4«OkA-JU 6 a-PtfF-llA .4-Pll«-SPC0 7X100K 


5*299 


246CH104K9PM 


AiJKdl 


I>o90- tf7i7 




HfeSISfOR 4U0R it •ZiU CC IC«-900/»000 


01121 


C91045 


AiNlK>^ 


Qba>-2U79 




HLstSfUK ZK St .zsa FC 1C— 4007*700 


01424 


C820ZS 


*1JR» 


064l>*6Ob9 


4 


Ac$lS7CR 6.2A >1 .250 PC tL*-CO0/*700 


01424 


CB82ZS 


AiJK»4 


do94-7ji2 


2 


klblXttM IH U .42S0 F (C*0*-100 


49704 


RF5Cl/9-r0*iOO4-f 


Al J«>» 


i)6««-7Ji2 




AftSi$ICM in 42 .1250 f IC*9^400 


lotoi 


NFSCl78-tO-IOOb-F 


Aiao* 


06U-949S 




RftSUfW S40R bt *250 FC 4..*-»00/«900 


OUZl 


C8S18S 


A4JK5/ 


U« 90-6 J2J 


> 


XSISIUI St .IX .IZSa F lc*0*-ZS 


03999 


FNESS-178-19-S001-8 




JO9IH6120 




RtaiSlQR 9K .4C .125* f TC«0«-ft> 


03881 


PRES5-l/9-f 9*5001-9 


AldA»9 


a«9i-l094 


z 


kr&|$t(3R 400R iOf 20 Ct IC*O»A02 


01121 


HBlObl 


A4JR61 


UOS3- 4oo4 




R^aisicai loot lot za CC tC'OaatC 


04421 


H61041 


A4d<»2 


0oS0-6/i7 




trSlilUR loot SI .ZSa CC 1^—4007*800 


01121 


CSIObS 


A 1 dKft J 






AlSlsIlVC Scl. I0N71O0K0HMIINCLUDESR4TI 


29495 


0911-3464 


AIIIRD4 


JoW-0/7 7 




HfSIStCM* FAD 4J4J0 CHA *U> 


294 90 


0898-8777 


A4dR»> 


a* I43-7SA9 


4 


rtl^lSlOR 751 it «2>0 fC IC*-9OO/*0OO 


01121 


C87S3S 


AlJKfrO 


2lOCH)^«i 


4 


RLSlSrOH-THHA 50 404 C fUP^AOJ 4-fRN 


73138 


7Z-101-0 


A4dM<»7 


06£1-2J^> 




XsISIOl Zt SI .Zsa FC rc— 4007*700 


0U21 


CBZOZS 


AidR»a 


0*Vl»-e7i7 




HtSiSlUt lout St .zsa LC 1C— 4007*000 


01121 


C94045 


AlvA69 


07ir-o«6» 




RLsIStdl lout It .IZSa F IC*0*-100 


ZbSbS 


C8-178-7O-I0U3-F 


*tJK7t 






H451SUA 40UR 41 .42Sfl F fL«0»-10U 


24549 


Cb-178-tO-lOOl-F 


AAJH72 


do«>- 2ui» 




0e5l$IOR 200 >4 *250 FC fC«-4007*6UO 


OUZl 


C8Z01S 


AlJKfi 




1 


KcSISiat bl.W It .izsa F (C*0*-10U 


24546 


C4*|/9*ro**192-F 


A4iM/A 


066>-6/fc> 


s 


aisislut 4.7t SC .zsa FC IC— 4007*700 


OUZl 


CB47ZS 


AIJ*7> 


JoU-lUi> 




AlSISIOI lot St .zsa FC lL*-4a07*IUO 


OllZl 


Cb|035 


aijh;» 


0V«>- 2w>9 




HcStSlUR ZOt SI .tSa Fk IC*-4007*«UO 


OllZl 


C8Z03S 


AijK7t 


OodJ-A/29 




H15ISIUH *.7R 5ft .2>M F(. U*-W0/47d0 


01121 


C88T2S 


A4JR7« 


d* 6A-97«9 




KISISIU. 4.7t SI .ZSa fC >L*-4007*700 


OllZl 


CBbfZS 


A10A79 


00B6'8777 




RJ ftISlUR FXO 1000 OHM 00 


28480 


OeW-8777 


A4jr«4 


oess-ms 




RtSISlOK ZK 6K Z$W FC TCXOO/*OO0 


01121 


C920» 


Aiu«»a 




4 


HtaSiAlOM V40K bt Ubts PC i;*«d00/*909 


OU24 


C89I8S 


A4ij«e> 


ubve-aor 




tkSISIOR lout St .zsa cc 1.— 4ao7*auo 


UIUI 


C91045 


«tJKa* 






R.siSIUK lot sc .Zsa FC tc— 4007*700 


OllZl 


C9403S 


Aijn»j 


Oo%-tf 7i7 




KISI5K* 4dwK 5« *2>a CC l*»-400/*«00 


OUZl 


CBIObS 


A4UAo« 






•USiilURe fAO 4J00 uHH *05 


20490 


0699*9777 


AiUHa/ 


O6*/B-0/r/ 




Hft6lS7UR» PXO 4U00 UHH *0> 


29460 


0699*9777 


A4dN9« 


gO0i->14> 


ft 


RtlUrOR bt *250 7v 1C*-400/40tM 


OUzl 


CB5U5 


A4UH»V 


Uod)-Vii» 




trSISIW Slu St .ZSa FC tC*-40U7*bo0 


OUzl 


C8SUS 


AlgA94 


J«AA-dvi9 




Hl5ISI^ 20 a 54 *250 PC U*-4J02*20i> 


04124 


L8Z0FS 


A4JR94 


oo4i*«rw>9 




acSiSILN Zot St .ZSa Fc lc*-4u07«8>M 


OllZl 


C92035 


44aRy» 


dC«i-jg£9 


A 


a.SlSIOt Ft St .zsa FC 14—4007*700 


0U«1 


C880ZS 


A4aH4A 


UaS>-A>7S 




a^SlslUR It s; .Zsa Fc rc— 40J7»7dO 


OlUi 


CBZOZS 



8-139 


















Section Vlll 



Model 34S5A 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


AlUH9> 






RASISrOR 200 >S .2S« FC IC«-*0i>/»600 


01121 


C8201S 


A10M9O 


i7oaS-2uiS 




AkSISIOR 200 >S *296 FC IC--40074600 


01121 


C82015 


AiOAvr 






RtSISIIM 2A >S .2>H FC fC— A00/F700 


01124 


C82025 


A40K9* 


USAA-202S 




RaSISTUK 2K Si .2»M FC 1C— A00/*7M 


01121 


CB202S 


A|gR99 


aBBS-a7T7 




RfAlSKB FXD 1000 OFM JIB 


2S480 


0B8e-«777 


AI0A10I. men 


0683-2O3B 




RESISTOR 70K S% FC TC— AOO/«eOO 


01171 


CB203G 


A10R10S 


OBSS-472S 




RESISTOR 4.7K 6% 26W FC TC- -400/<B00 


0II3I 


CB877E 


AIMIM 


06S3-J33S 


1 


RESISTOR I3K n MH FC TC'-AOO'fBOO 


01l2t 


CS1336 


AIRI06* 




1 


PAOOINT. I IKT IP/0 0346E-43S01I 








0BRR-»S9 




RESISTOR 7J7< F 


74S46 


C4-t/B-T0-’»71-F 




oete-3AS7 


1 


RESISTOR B.IMK 1« .I7SW F TCW7— lOUin.SVI 


246AB 


C4-I/S-T0-008R-F 




07B7-0437 


1 


RESISTOR 4.7SK 111 .12SW F TCHTi-IOOiaOVI 


24S40 


C4-1/»-T0- 8751- F 




07S7-O4S 


3 


RESISTOR 3S7K l« .I76W F TC-OF-IOOI 3.SV1 


24546 


C4-I/B.T0-382I-F 




07&7-(Mn 


3 


RESISTOR 3J3K l« I7SW F TCKK-IOO(4.0VI 


2464S 


C4-I/B-T0- 3321 'F 




OBSB IDE 


1 


RESISTOR 7SK IK I75W F TC^-IOOMSV) 


74S4B 


CA-1/8-T0-280I-F 




OE8B-31SO 


\ 


RESISTOR 7S7K IK .I7SW F TCW>*-ia0|.6.0VI 


3464B 


C8-I/K-TO-237I- F 


AIJMI 


0797-0«:7A 




RtmilSl I.2U IS .12>M F tC*U*-100 


2A546 


C4-I/8-T0-1213-F 


AldHiUI 


ti«»-2u2S 




HLSISlUR 2A SS .2SII FC TC— A00/*700 


01121 


C8202S 


AiDHlJv 


riAiU-*72S 




RlSISrOR 4.7R 58 .250 fC TC»-400/*700 


01121 


C84725 


AiUHiOV 


ObA»-A729 




RESlSItft A.TK SS .2»a Fc 7C— AO0/A7O0 


01121 


C84725 


AIW11I aa 


06BS-472S 




RESISTOR 4.7K BK .3SW FC TC«-A00/«700 


01121 


CB472S 


Aijsi Ae 


i>A9^0eg2 


4 


iairCH-HAO REEO FURR A 3VA 12U0V CONI 


28400 


0490-0802 


Aiaii 


9io^a«ra 


4 


THANSFORMtH. PULSE 


28480 


4100-0478 


Ali)l2 


11GO-M79 


1 


UANSFWRCAo PM.SE 


20480 


9100-3879 


AlOUA 


1E2A-OAA9 


2 


1C RC 44S6C OP AHP 


0A71S 


HC1434CC 


AiUil^ 


I92^0k99 


2 


IL HA 2A2S UP AMP 


28480 


1824-0104 


Aii>g3 


lEjft-OAO* 


1 


1C LF 395 OP ARP 


2701A 


LP355H 


AlUUA 


1E2E-01A7 


6 


ICi 2 COHMUIER LHSJ9 .>PEC. 


29480 


I824-0547 


A|0V> 


lEJA-OAAT 




U« J CORRUTEA LRJ39 SP«C« 


2eAB0 


1824-03*7 


AIOU« 


1E2»-0A*7 




1C* g UiNRUlER LH339 SPEC. 


28460 


1824-03*7 


AlOU? 


IS2A-047I 


1 


1C OP AMP LOW DRIFT TOOO 


07100 


0P-07CJ 


AiUUA 


ibg6>0JA7 




ILt J COHPUIER LH339 SPEC. 


28480 


1824-03*7 


AIJI.I9 


|S26-0iA7 




iLt J COMPUTER LM3S9 SPEC. 


28480 


1824-0347 


AlUUU 


l»2i>-U9« 




iC-gl6JtAL SR74LS174H TU IS HER 


012BS 


SN7*ISI 7*N 


A1UUI2 


462l>-i496 




IC-ai6lfAC SR74LS174H IfL LS HER 


012BS 


SN74L Si 74N 


AlOKU 


1420-1496 




IC-OINITAL SN7ALS17AN TIL LS HEX 


01295 


SN74LS174N 


AiguiA 


ia^0-Ui6 




IC-OISITAL SH74LS41SN TU IS 3 


0129S 


SN74L S138H 


AlUUi» 


442^1196 




4^-01 CITAL SN74L$174H TU LS HEX 


01245 


SN7*l SI 7*N 


Aiauio 


i020-4l9(» 




IC-3lblTAL SN7ALSITAN TTL 1$ HEX 


01295 


SN74LS174N 


Aigulf 


444i>-U96 




1C-31UIIAL SN7ALS1TAN TTL LS HEX 


01245 


SK74LS174R 


Aiguib 


44 26-0461 




CC MC I436C OP AM 


04713 


RCI434C6 


AIjOIV 


1S20-0A71 


4 


IC-DI6IIAL &H7406H TTL HEX 4 


04295 


SN7496R 


AlOMl 


482(^1497 




IC-3I6ITAL SNI4LS00M TU LS OUAO 2 NANO 


04295 


SN7*LS00N 


AiOWk^ 


182<7-il99 




IC-0I6ITAL SN7M.S0AN TIL LS HEX 1 


01245 


SK74LS04H 


Aigg^> 


1420-4420 


2 


IC-3lblIAl SN7ALS92N TIL LS OIY-X-12 


01245 


SN7*IS47N 


AUU«4 


4820*0474 




IC-DICITAL »R7406M IfL HEX 1 


01245 


SN7*0AN 




4418-2279 


4 


IC* RJ5-A0H 


28400 


181B-22 70 


AIJU<6 


0345S-S3B01 




NANOPROCESSOR ASSY INCLUDES AlOfllOB* 


28480 


034S6-82S0I 


A4>)U</ 


4«40-1496 




iL-JiultAL SN7ALS0JH IIL LS OJAU i NANO 


01295 


SN7*L S03N 


AlgiMA 


4420-4499 




<fOJ»ITAL SK7HS04N lU LS HEA 1 


01245 


SN74LS04N 


Algu^y 


U 2 i>-iivr 




IC-DlallAL SN7ALS00N ITL LS OUAO 2 NANO 


01245 


SR74LS00N 


klu/Oii 


442lH44<0 




U.OtCITAL sN7*LS92N TTL LS OIV-X-12 


01295 


SN7HS42N 


Aigu>« 


lA^IUE 




IC-SiOirAL SH7ALST4N TU IS OUAL 


01295 


SR74LS74H 


Aiauij 


4420-44U 




IC-JICITAL SR74LS74R TTL LS DUAL 


01245 


SN7*L S7*N 


AiUUiA 


1«S<HBS77 


2 


OPID-ISOLArOA LEO-POlO/lSU tF*50RA-RAK 


2S480 


1440-0577 


Aigu}» 


199(^0677 




OPTl^ISOlATUR LEO-POlU/XSiX IF*30MA-MAX 


28480 


1990-0571 


A4UUiA 


la^oiSA 


4 


K V RGLIA 


77014 


SL2S683-2* 


AiJiiiT 


10 <^0299 


4 


IC V HCLtA 


27014 


LM330T-24 


Aigg3« 


ta<&-03B6 


1 


1C 7A19C V HOlTA 


02237 


78I5UC 


A10>JA« 


ll3A-0<77 


4 


II LH 320 V kCLIK 


27014 


lM320t-15 




4206*ojgy 


4 


HcAT SINK SCI TU-220-PXb 


28480 


1205-0309 


Aig«4 


gj499-«l607 


4 


LABLE ASStMRLTi l.l .lINCLUOES PI) 


28480 


03495-61607 


AlOHi 


gg 469-64 wO« 


1 


CABLE* 40/4 OIVIUEA 


28400 


03455-6U0I 


AlWAl 


420i)-0466 


4 


sUCXEI-IC M-CUNI OIP-SLOH 


00113 


A-23-2030T 


AiJVi 


04 4g-046> 


1 


C.JTSIALt UUARU ASIB.TOObHt 


28480 


0410-0661 




>04il-Al7A 




GJlUE tPCJC-IN PL 40AAU 


28480 


5040-0170 


All AC 


11I77-BBB01 


1 


ASSEMBLY. REFERENCE 


28487 










NOT FIELD REPAIRABLE 












REBUILT EXCHANGE ASSEMBLY 








in77A 




REPLACEMENT ASSEM8LV 






AA RESISTOR A 


IOR11IAPPLIESONLY 


TOSiftlAL 


NUMBERS leaAOOill AND ABOVE 






AA REEO SWITCH AlOSI APPLIES ONLY TO SERIAL NUMBERS 1B22M)O410 AND BELOW. 






AC REPLACE WITH A20 ASSEMBLY PART NIWBER 111778 FOR REPLACEMENT OR EXCHANGE. 

1 1 1 







8-140 














Model 34SSA 



Section VIII 




Reference 

Designation 



HP Part Number 



Mfr Part Number 



A13 

A12C1 

A12C3 

A12C3 Ae 

A12Cft1-CR4 

AIZCflS 

A12Cne.CR7 

Ai3c<ra 

AI2CR9 

A13CR1I-CR1& 



AI2RI 

A12R2 

A12R2 

A12R4 

A12RS 

A12R6 

AI2R7. RS iA Ag 
AI2R* 

A12R11 

AI2R12 

A12R13 

A12R14 

AI2R1S 

A12R18. RW dA AB 

AI2R1B 

A12R19 

AI2R21 

AI2R22 



0346B-B6BI2 

OltO-ffiX 

0160-0184 

0160-0167 

1901 0060 

1902-0777 

1901-0060 

1901- 0038 

1902- 3139 
1901-0060 

1966-0247 

1863- 0020 

1864- 0087 
1964-0079 
1866- 0247 

0983-1116 
0883- 4326 
0767-0069 
0683-2739 
0696 4468 
0699-4202 
0767-OU2 
0683-1236 
0683-4716 
0683-2426 
0683 3036 

aNB-3461 
0683-2736 
0767-0442 
0683-4336 
0683-1639 
0683-1236 
0683- 1126 




AA see NOTE ON SCHEMATIC 4. 
A 8 SEE NOTE ON SCHEMATIC 4. 




PC ASSEM6LV, OHM CONVE RTOR 
CAPACITOR FXO lUF'-TOBSOtlDCTA 
CAPACITOR FXO .038UF«-I0» 300 VOC 
CAPACITOR FX04700PF«-108 200VOC 
OlODE-SWITCHINC 80V 200MA 2NS 00-7 
OIOOE-2NR 1N826 8.2V 6\ 00 7 PO-26W 
OlODE-SMIlTCHINaBOV 200MA 2NS DO-7 
OlODE-HV RECT 1KV 600MA 00-29 
DIODE- ZNR 8.26V 6« DO-7 PO* 4W TC».063« 
OIODE-SWITCHING BOV 200MA 2NS 00-7 

TRANSISTOR-3FET DUAL N-CHAN O-MOOE TO-71 
TRANSISTOR PNP SI PD-300MW PT«I60MHZ 
TRANSISTOR NPN SI P0*360WW FT*7SMHZ 
TRANSISTOR NPN 2N3439 Si TO-6 PO*1W 
TRANSISTOR-JFET DUAL N-CHAN 0 MODE TO-71 

RESISTOR no 6« 39W PC TC<-4007*600 
RESISTOR 4.3K 6« 26W FC TC*-400/>700 
RESISTOR 1M l» SW F TC-0>-IOO 
RESISTOR 27K 6« .2SW PC TC*-400/*8a0 
RESISTOR 1 13X IK 12SW F TC<«> 100 
RESISTOR 887X 1% 12691 F TCH7«-100 
RESISTOR lOK Ik 12691 F TC^-100 
RESISTOR 12K 6« 26W PC TC— 400/»800 
RESISTOR 470 Sk 26W FC TC-- 400/*6K 
RESISTOR 24K 6k .26W FC TC--400/-700 
RESISTOR 30K 6k 39M FC TC>-400/>800 

RESISTOR 133K Ik 12W F TC~-I00 
RESISTOR 27K Ek .26W FC TC--4aO/*900 
RESISTOR 10K Ik 126W F TC^-100 
RESISTOR 43K 5k 26W FC TC«-4a0/>800 
RESISTOR 15K 6k 2S9I FC TC— 400/«600 
RESISTOR 12K 6k .2691 FC TC*-400/«800 
RESISTOR I.IK 6k .26W FC TC--400/»700 




03466-66612 

I900106X0060A2 

0160-0164 

0160-0167 

1901 0060 

1N826 

1901-0060 

1901-0036 

SZ 10939 168 

1901-0060 

1856-0247 
1963-0020 
1664 0087 
2N3439 
1866-0247 

cams 

CB4326 

MF7C1/2-TO-I004 F 
CB273S 

C4-I/B-T0-I13I F 

C4-I/8-T0 8871- F 

C4 1/8 TO-1002 F 

CBI236 

C84716 

CB2426 

CB3036 

C4-1/8-T0 1333-F 
C82736 

C4-1/8-TO-I002 F 

C84335 

C81636 

CBI236 

CB1126 



8-141 





















Section VIII 



Model 3455A 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 






1 


Ht8ISIUt lOoK 2* IH no TC-04-200 


US02 


•032 




tiethMTt 


1 


rHAMSFQRH^At POLS£ 


28480 


9100-0479 




lSif>•0^ki 


2 


lb LH JOli UP AMP 


27014 


CH9014M 


kUui 






U iA 301A OP AHP 


27014 


LH30IAN 


Ati 




1 


P.C. A3&Cn9Lt» AC CQHVEKrCA 


204A0 


03455-04S23 


Altti 


oitu-mt 


4 


CAPACII0A-7X0 iOPf JOOoVOC MICA 


20410 


0100-2199 




i>i«O*440A 


1 


CAPACIIUD-PXD .ISUP 4-108 lOMVOC POLYP 


20400 


0160-4404 


AiiCi 


0i«0*4«0i 


i 


CAP1C1T08-PXD .UlUF 4-108 lOOaVOC PULTP 


28488 


0140-4401 


*liC« 


aiAO-A4a2 


1 


CAPACITOA-FXD mlUf *-104 iOOtfVOC PUL7P 


20400 


OUO-4402 


AliL> 


()4MH2AV9 




CAPAUTUA-FXD 3QPF iOOvVOC H1CA 


20400 


0100-2199 


AiJL« 


0t4»-«39« 


1 


CAPAClfOMFXO .0A2UF ♦-tOl 200VVI>C POITP 


20400 


016>^4390 


«t)ki 






CAPXCilUR-PxO .U62UP 4-108 200OV0C POLYP 


28480 


OUO-4390 


AULA 


inAt^ALOl 




CAPAClfOA-fAO •OlOP ^40t 4U0HWC POLYP 


26488 


0100-4401 


A|4tV 


inbO-A^iJl 




C4P4CIIUA-rxO .OIUF 4-108 lOMVOC POLYP 


28488 


0100-4401 


AliCli 






CAPACIIUA-FXC 33^»-iVt WVX 7A 


34200 


IS00334X90I062 


AiiCiA 


01«>-049r 




CAPACIIOA-PIO 2.20P«-lOt 20VOC lA 


S4209 


1000229X9020A2 


AiiMi 


uido-i;j> 




CaPACIYUA-PAO .22gf»-iat J3V0C ta 


S4209 


1S00224X9039A2 


AiiLlL 


‘)lA^^i99 




L4P4LIIOX-PXO 13PP 4-88 JOObVOC MILA 


26460 


0140-2199 


«liU> 


out-o*» 


1 


CAPACITOA-V TRfW-AU 1.7/14.1PF 330V 


74970 


109-305-I29 


A13L10 




i 


CAPLCITOR-rXO >PF 4-108 800IVOC N1C4 


26480 


0140-0743 


A13C17 


OieO-0383 


1 


CAPACIYO8-FX0 620PF *-6« 30OWVDC MICA 


38480 


0160-0363 


A13C1S 


0180-1746 


1 


CAPACITOn-PXO I8UF4-I0* 20V0C TA 


86368 


1600166X902062 


AI3C19 


0I6O-0848 


2 


CAPACITOR-FXO 346PF 4-1% SOOWVOC PONC 


28480 


0180-3849 


AI3C21 


0180-0083 




CAPACITOR-FXD OIUF •OO-TOV 100WVOC CEA 


38460 


0100-0063 


A19C22 


0180-0187 




CAPAaTOR-PXO 2MP4-10% 20VOC TA 


66289 


I80D338X9030A3 


A13C23 


0160-3134 


2 


CAPACITOR-PXD 01UP f'O* lOOWVDC CER 


38480 


0160--91S4 


AI3C24 


0180-0187 




CAPACITOR-FXO 2.2UF4-10* 20VOC TA 


56200 


1SOD228X9030A2 


A13C28 *A 


0160-0378 




CAPACiTOR-FXO 27PF *-6% SOOVDC MICA 


38480 


0160-01B1 




0160-2180 




CAPACITOR-FXO 33PF «-S% 300WVOC MICA 


38480 


0160-3180 




0140-0190 




CAPACITOR-FXD30PF SOOWVOC MICA 


26480 


0140-0190 


AI3C26 


0160-3848 


2 


CAPACIT0R-PX038PF «- 1% SOOWVOC MICA 


38480 


0180-38*6 


A13C37 


0180-0086 


1 


CAPACITOR-FXO .06UF *80 - 30% 100WVOCCER 


28480 


0)80-0086 


AUUO 






CAPACITOA-PXO 30PF 304HVK HICA 


2040D 


0160^2199 


AlJi^A 




4 


CAPACIIOK-PXQ li>PF «— It IJOOMVAC POAC 


20400 


0160-3970 


Alien 


l,»|«0-3977 


1 


CAPXCITUX-FXO 970PF 4-lx lOOaVOC PORC 


20409 


0140-3977 


AliLi^ 


0144-0202 


1 


C4PACIiaA-FXD 13PF «-3| 30UMV0C PICA 


72134 


ON 1 SC 1 S OJ OS 00 V VU A 


AlJkii 


0i«O->V30 


i 


CAPACITOH-f XU lUPF 2&i>0«VK PQAC 


20400 


0100-3930 


AllLJ* 


J1 21-0434 


2 


CAP4CII0A-V YAMA'AJK 2«4/2483PF 330V 


74970 


189-S09-12S 


AULi^ 


JleO-3d81 


2 


CAPACIfOA-f XO .lUF 4-204 4J3VV0C HCY 


FA002 


00710440 


AliLHl 


1902-^447 


3 


DIOSE-MR 23Y 88 00-7 PO«.*l< IC*4.0738 


04713 


SZ 10939-249 


AlSLAi 


1904-04)3 


2 


blOJE-GCN PAP leOV 200AA UU-7 


20400 


1901-0033 


A13C«i 


1901-0040 


24 


dlOOE-MnCHlItb 30Y iOlU 2N8 00-38 


21410 


1901-0040 


AIMA 


I9C1-0433 




UlOuE-GEH PKP l»OV 2UUKX tX>-7 


28460 


1901-0033 


AliCR> 


I90t-081a 


9 


0|U0C-3CHaHKY 


20400 


1901-0518 


AliCilA 


49Ci*0UU 




OIDOe-lCHOttXY 


26460 


1901-0818 


AI4b4l 


l9U*3i20 


4 


0IUUE-2NR T.32V 88 OO-I PU-.4V tC*4.0*88 


04713 


82 10939-143 


AliUiA 


lObl-OuM 




DIOOe-SPiTCMiNC 30V 3UHA 2N3 00-33 


20400 


1901-0040 


AIACk^ 


19bl-Og4g 




UIOUE-EpIKHIM 30V 80RA 2N8 UO-38 


20400 


1901-0040 


AliCrt|4 


I9C1-U<<*0 




0I0UE-8H1TCKINC. lUV 80RL 2MS 00-38 


20400 


19U1-0040 


AUCHt^ 


l9i;l-0<J40 




OlUOi-3»JYCHlNO 30V 90HA 2Nb 0D-3S 


20400 


1901-0040 


AiiCHlJ 


lVQ2-34<jA 


2 


UI30E-2NR 4.78V 28 00-7 P|1*.4V IC— .0191 


04713 


82 10939-99 


AijC«4« 


l9C^-iU«4 




DI3DE-MR 4.T8V 28 00-7 PU«.44 IC«'.0198 


04711 


SZ 10939-90 


A4 3Ci«4» 


1901-UU9U 




UI33E-8kltCHlN0 30V SOU 2N8 JO-38 


20400 


1901-0040 


AliCHio 


I90l-0v<»0 




umUE-MlIbHIAC 3UV SWR* 2Ni UU-3S 


20400 


1901-0040 


AlJCRi/ 


I9CI-OV47 


2 


UIJOE-EWITlHIMC 20V 7SU IONS 


20400 


1901-0047 


AlACAt* 


I901-UJ47 




OlUU(-Sy|YCHblC 2UV 7VNA iJNi 


20400 


1901-0047 


AlAUi# 


I9CI-0O4O 




OlOIE-SHIILHlNb 3UV 80X4 2M8 00-38 


28480 


1901-0040 


AliCK4l 


|901*0O4J 




UlUOe-^ViTCnlNt* 3UV VOHA 2N3 DO-33 


20400 


1901-0040 


AUU2^ 


I901-0w4g 




UUDE-SMirCMlM. 3UV SOU «NS UU-3S 


21480 


1901-0040 


AiJAl 


J4VV0883 




•IIL4T-HEE0 lA 130H* lUOOViK SVOC-COIl 


20400 


0490-0683 


AlilU 


0*90-0683 




HLLAY-ACEO lA UOMA iOOUVX SvK-CUjL 


26460 


0490-0883 


AliAi 


0490>0wbi 




RrlLV-RttU 14 IJORX lOJOVOb SvOb-LOIl 


20400 


0490-0O03 


AUUl 


iOH-oon 




rKAN&UYOK HPn si PU*3jOAii F7«200AH2 


20400 


1054-0071 


A link 


i4M-0071 




UAASISTOA NPn SJ PO-iOOAM Fr«200MH| 


26460 


1684-0071 


Aijyi 


40 SV03A«» 




IH498I8T0H 3-Ftl 2M3V2 N-CHAi< O-HOOE 


04713 


2N4392 


Aliy4 


10t>-U^Ao 




tAANSUlOK J-fir 21*4392 N-CHAN iP-HCWE 


04713 


2N43V2 


AUW» 


4A)9-0i9» 




lAANSUUlA 2-Ftr 2N4392 9-CHAV O-HUOC 


04711 


2N4393 


AlJLL 


l«8>-OJ4b 




ULHSISIUR J-Ftt 2tt43V2 H-bHA^< 0-MUDE 


04713 


3R4393 


Aiiwr 


1«;4- 0^91 


2 


rKAkSUTOR NPN 3l TU-16 Pi>*34UNa 


20400 


16 34- 0381 


AiJw4 


laii-Ouiu 




UkVSIStOR PV 11 10-18 PUOsURk 


20400 


I6S3-00I0 


Aiiyv 


loS3-0«20 




TMANSJSrOA J^PCf 2M43V1 H-CHAN O-HOJE 


04713 


2N4391 


A4>g44 


IdM-Oost 




fMASISTQfi KPN SI Tl>-IA p4^«3vl>KM 


20400 


1684-0331 


AA S9ENOTEONSCH 


EMATIC3 




- 







8-142 
















Model 34SSA 



Section VIll 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




ISM-UwitS 




1444$! &IUH PNK 3l fti-U Pl>«3^vM« 


2«4»9 


lSSS-0013 


J 


t»»*-oj71 




lASNSISIUK nPN SI P»>3<WIU rr-23«A>u 


2ak«0 


itSA-oo ri 








rK4*«$UfO«l AH^tl dMi-fl N«h.HA4« fr*HOUC 


04745 


2N4394 


*&iyi9 


I«s>-0»y2 


1 


liUhSISIOA-JKI IIU*L A-<HA'< U-IUOi SI 


|7»54 


E*2I 


*i>H4 


a4«>-&i4> 




hlSisiw sijK St .tsii »b r;>-«oo/*909 


9U24 


casiAS 


*1J>U 


UAAj-^4iS 


4 


teSlSfOA 22K >4 »Zb^ FC IC«*40D/*«0C 


0II2I 


C6223S 








MSlStlK St .3>l FC fk*-*0«/*a00 


04424 


C92259 


&liA4 


y«Wi->Ob 


2 


•tSISTOR 3ttK It .12Sa F <.•<l•-IOI> 


RISiT 


CRE-SS-lf r-1 








KtSlSIiM 34AH l\ *42»4 F TC-U4-400 


9I6S7 


CHF-SVl, I-l 




07)7-y^.»3 




A«3l4l4Ai 40tfA 4( * K«0«*400 


2ASk> 


C*-l/*-I0-l0OJ-F 


hum 


UTJT-<Uru 


1 


KL^ISia* 2SSK IS .I2SH f lt>»«-10l> 


2tSAS 


CVl/O-fO-Em-F 


Ali«» 






kLSISiUt 22K >t .tSH Ft tL*-«0<l/*IOO 


01121 


CBEZiS 


Ali«« 


y«*«i-409> 




lUblSlQR 40A »A .2>M FL f4**4a0/»70y 


01441 


ceiois 




yA»i«>i49 




iuSISIUM SIdK St .2sa Fb IL•-40l)/»«03 


J112I 


casiAS 




^iC4^4A.|6 


3 


atSISIOH-rilMK SOK Id* 1 SiUE-AOJ ir-TSM 


S2A*r 


JOOAP-I-SO) 


AliMia 


^igw«i>j9 


4 


Kw3l3l(K'74AA it. tOS b 47-ffU8 


>279? 


5005P-1-202 




JAM-44»7 


1 


HlSISIW l.dSK IX .l2Sn F U-dF-lUO 


24545 


C*-l/a-l0-l05l-F 


A&jMv 






Ac^ISfUH ItM •«»« fC fi.*>4O0/»7OO 


04124 


caiois 


Ai JAi* 


or»r-u«oi 




MclISIUi lUU It .USM F IL*a*-lJd 


24545 


C4*l/5-Y9*101*F 


A1JH17 




i 


KtalSlUl Fit It .l2Sa F IL>0*-i00 


03 351 


PAE55*4/5«r0*4120*F 


AUKtj 


M60WU4» 


d 


K.slsn*! 2UUF St .2>a Fk 1C— «<M/*S09 


01121 


CS20AS 


Aii«14 




i 


Kl$1>IQA si 54 .2Sll ft fC*-450/«Sd0 


01121 


CSSIOS 


AijiUl 


y7S7*>iH^i 


1 


IwSItlUK IW.IK It .l2Sa F TC-dF-lOU 


24545 


CA-l/a- IJ-SOU-F 


AiilU4 


yA9A*4<»d4i 


4 


dkSiSIUK 2«.TK It .KsM F lk«dt-ldd 


24945 


c*-i/a-i3-2»r2-F 


AiilUl 




3 


MkSI Stdk'IRMR SA Id* C SiM-AdJ il-IHN 


>2997 


3006P*4*902 


AliHih 


U»IL>-2w2» 




RCSISi« 2K St .2Sh FC TC--40d/*r00 


01121 


CB202S 


Ai«H^> 


0A9»-42l> 


3 


KttlSIiMStK M IP/0 MATCHED SET ATSje.t}) 


25409 


0595*0249 


Ai>M^« 






RcjISIUA 2K M .254 Ft 1C— 400/47UQ 


94424 


CS202S 


Ai>H^7 


0A6>-tvtS 




4uy S4 ft 1C«*4yO/»500 


04121 


C54019 


AiAfUS 




1 


ArilSilX 44i> a •2>4 Ft K**400/*600 


04424 


C52419 


AiilU^ 






KtSiSTW 22K 31 .2311 FC IC--«d(l/>*UO 


01121 


C8223S 


AiJMii 


ttQa»-u» 




K«>isiun >4 •2>4 Ft 7t*'4yO/47M 


04121 


C54059 








K 3ISIUH 3iet S« .tSa fk lk—FUU/*Wd 


94424 


C59149 




U747>tK42 




lOK *14>4 F rk.«y»-laO 


24545 


C4-4/5*f0*1002*F 








R.SISIUk IdA S^ .tSH FC tk— a90/*aU0 


01121 


CKU)S 


AiilO> 






Ao^lStOk 3K b« •4>b FC 7C— 4yt>/«700 


01124 


C0302S 


Ai»H9o 


2 luK^dOv 




KCSISIUk-IRn« 3UK Igt C sluc-AUJ 17-lkN 


J2»»T 


>005P-1'503 


Alai^j? 


96A3-474b 




Ae^lblUK 47t 94 •2>t Ft fC»*400/4400 


04421 


casTis 


AiAAiA 


j4lW-b«|b 




RL31SIUR 487K £\ (P/0 MATCHED SET R2S. 38,t3) 


2«4e9 


0595-5219 


AAJHjy 


J4 W-4«02 




A.5I34LW A.«7* IS mld>4 F rc.«0»-40a 


24545 


ck-i«-io-ea7i-F 


AAAA%i 


y« 9 o*4^0a 




RcSIalUR d.«?K i4 -ItSk F Ik-JF-IOQ 


24945 


c*-i/«-T0-ae7i-F 


A1^A«£ 


k)0«»*4«a2 




K.515I0A A*57ai |< »Ubm ^ fC-Q^-iOO 


2454 5 


C4-1/6- T0-B5I4-F 


A49Mi 






K'.SISIOR 2M 51tlP/OMATCHEOSETn2S.3e.*3) 


26450 


0592*5219 


AiiMA 


y^W-osiiA 


4 


KI.41SJQA 30.7K S% (F/0 MATCHED SET na. A45) 


264b0 


0695-8215 


AIJUA) 


l)s«»- •.>(!> 




R<SISlUH 2M M IP/0 UATCHEO SET R4t, RtS) 


204B9 


0o95-52l5 






d 


K,;alSIUH-ta>lH 3IM Idt k >lJC-AbJ iT'IRn 


S2F«r 


SOOkP-l-SOt 


Atiut 




i 


U CM 2^44 UP AMP 


27dlS 


LA204AH 


«l>u2 






IC CH 2Ul* kP AMP 


27014 


IH201A4 


Ai>Ua 


L«10-u>>J 


1 


lw« FiHl UNk CHIP 


25460 


IBIi)-O2S0 


Ai)y4 






1. CM 2dlA UP ANP 


27944 


IH204AH 


*iiV9 


l•2»-blu< 




U HA 2625 UP AHP 


26450 


IBta-0109 


AIaUo 


l»^-l>*ft 




If^UlfAL SN7«VtA fft HbA 1 


0120S 


SN7A0PS 




I6gi>*09is 


1 


&tAMPl«p, 0AS *020» THt 


IA16S 


uau 




4040-UMA 


1 


eAYhAcTUR«>PC aU »U PM.TC •042-yH*Y>«N3 


25459 


t040-0lk« 


AiA 




4 


P... SSSEHsLT. «d kUNVtKItR 


2a«so 


03499-55914 


Al^l 


yiS4Hy«M»4 


3 


k-PAblTUK-FXd .lUF ••d-^U> IddaFUk CER 


25459 


Qiso-ooat 


Al*b« 


CI*d-A.«J 




tAPAtlfOMFlJ *g4«yf ••lu« 4UU4VJW PJiTP 


22469 


0150-4)96 


AiACi 


Ul4^Ui44 


4 


CAPAUfaK-FAD 4lOPF »>>4 3304V1X. MJCA 


72135 


OH4SF4riJ9JOOHV4CR 


Ai«CA 


UiM-Uw4.4 




tA«PAt IfUH-FAg «4UF lUObVOt tEA 


25459 


0190- 0054 


A|At> 






yR.PACIfOH-FXO »4UF *4.}^d4m i^lUtVOC tEA 


25459 


0490-0054 


«>»<.<■ 


u14<^24«4 




CAPAtl fCA-FxU luUPf «-94 »3uiaV«iC HltA 


2 a*«o 


0160-2204 


AlAuti 


14 w 9*>7 




OlJga-lllA 4iV >« JU*7 PU«.«M fC**«U75t 


o*m 


U 109J9-269 


AI4vK« 


IVkl- CD76 




OIJJE-GENPRP XV EOMADOat 


25449 


1O01-037S 


Al^^iO 


14CI-Vv4y 




UJwi>t-$«ltCn<NU iUV SOAA 4N5 OU-5> 


25410 


4901-0949 


A14bPt4 


IVCi-y>la 




g|U«rfc~lkN PaP ^»V soma OU-7 


25460 


4901-0375 


Al«U> 


14U|*Uj7u 




Ul JOE-CIN P4P >>V >UHA «4U*7 


26450 


l«01-03 7k 


ai«c>is ‘A 


l«i:i-0376 




dl Jkt -GEN PRP 36V SOMA DO X 


25459 


1001-0376 


AI4UA7 


ibcj-j<ir 




dIJdt-tNH /JV 3. Uti-I PU^.th Ik—. out 


0«71) 


42 l09iV-269 




IVCl-Uw*^ 




UlJJt'iBlICniliC >OV 50H* e*«4 UO«3> 


25459 


4904-0945 


AI4CK4 


lVCI*Vv4g 




0iO9t-4M|TC:ilHU iOV 9JAA «N5 (H>-35 


2545U 


4901-0040 


Ai^VK4<^ 


ivCl'^UwAJ 




Oljgb*5iil7LHlSC 30V 50HA «4» 00*.»5 


26450 


49g4-Q940 


AA SERIAL NU 


MBERSIG2AQ623IAN 


DAaOVC h 


OTE (dSION SCHEMATIC S. 







8-143 













Section VIII 



Model 3455A 




Reference 

Designation 


HP Part 
Number 


Qty 


Description 


AUUil 


i«C4-o>ie 




DIODE- SC HOf lev 




lVOl-0040 




OiSOE-SBlTCHINC 309 30NA 2NS 00-35 


AI4WA 


1933-0020 




T96NSISTOR FNF SI FO-IOOHH FT-130HH2 




l»S3-0ul9 


1 


UANSisroft SI n>-ia 


AIM 






fuaNSlSIOA J-fEI 2N9391 N-CHAN O-HOOE 


*1404 


1633-0033 


1 


liONStSTOR J-FEI N-CHAH O-MUOC 10-72 Si 


AI40S 


199V CBAB 


1 


IRANSiSIOK-JFE7 0<1AL M-CHAN O-NOOE Ta7l 


*1404 






r«ANSISn» FRF SI FD-SOOM FI-I30NH2 


919K1 AB 


06 93-I03E 


1 


AlStSTOR *0K 3E ,23H F( f(•-9002*700 


«l4lt^ 


04*4-^024 




RESISTOH 29 3< .239 F( tC— 900/*700 


Ai4«* 


0696-3133 




■feSISfOR 4.44K 11 •i2in f fC*D4-lD0 


AI4H4 




2 


RiSISIOR 109 .11 .1239 F99 lOOW 


*14«> 


0 7»7>iHU 


i 


RlSlSIOl 9.329 IS .1239 F IC•U9-IOO 


AI4K4 


07S7-»0*«0 




ibSJSrOl |A M •1294 F fC«94-100 


Ai4M? 


a4«H>/24 


1 


RISISIOR 6.999 IS .1239 F IC«0*-100 


A14MA 


D7«7«0440 


1 


AtSISm 7.5R 11 .USA F fC*04-100 


A14A4 


0747-0442 


1 


RlSlSrUR 739 IS .1239 F t(>a»-100 


A14AU 


07 i7- 04 JO 


i 


Risism 2.219 IS .1239 F I(«09-I00 


A44MU 


04 44*i»ii 


1 1 


RtSlSIOS 663 It .1239 F TL-O'-lOO 


Ai4Aid 






RESISIOR 39 3S .239 F( l(— 9002*700 


A14Hii« 


04tti-224J 


1 1 


ALSlSrot 22M 51 .250 FC fb«-VDD2« 1200 


A44A14 


07S7-O442 




ftkSISm lOK le .1256 f 7(.*0»-l00 


Al4Ai> 


0atl-3ul7 


1 


RESISIOR 19.89 IS .1239 F99 r(-0*-3 


A14A44 


07S7-O44I 


1 


AtSlSrCK a.25« It •I25K F fC-QJ-lOO 


AiertU 


0 747-0449 




47$JS7i» loot It •125a F rC«0«-100 


A19K19 AB 


07 37-0273 




RESiSKS 30)9 IS .1239 f TC*0*-tOO 


619K19 AB 


raMH-AAAO 


1 


RtSIStOK B« it .1239 F IL>0*-100 


A19IU0 AB 


oe»e-32» 




KtSJalOA a.40Kl4 .U54 F 7c«04-l00 


Ai^iUi 


Odll-2>77 




AeSlSfGF lOR •11 •125a P«« TC«0»-2 


AlAiUi 


0649-Ji»> 




RESIStW 4«44K It •125a F Tk>0f-100 


Al4>Ui 


04a 43-4215 


i 


USISIUK «20 5t •25H FC TC«-40O/»»0O 


A19K29 AB 


11683- 103B 




A^SJSIOH 1DK 51 .254 Fb 7C**400/«700 


A19K23 AB 


0443- 1036 




RcSISlOR )0K 3t .239 FL TC*-9002*70<) 


A141U6 


0490-3440 


2 


RESISTOR 9699 IS .1239 F T(«0*-100 


*I4Hd/ 


049d-0<»49 


2 


KqSISIOI 1.98M .IS .239 F IC>l>*-23 


A14IU0 


<1693-2733 




RESISrtR 279 3( .239 F( l(— 9002*600 


Al^lUi 


04«i- JV25 


1 


RESISIOR 3.99 39 .239 F( K— 9002*700 


*14MJ0 


049^0440 




RcsISIU) I.28H .11 .239 F T(*0*-23 


A14H41 


94 9a- 3240 




RESISIOR *699 IS .I23r F I(*0*-I00 


AlltllA 


049A-3409 


J 


ReSI&KA 40.2R IS *1254 F fC«04-100 


A14K4A 


0490-3499 




9£$ISI0R 90.29 IS .1239 F U*0*-100 


414^94 


O4»3-102> 


1 


Rl-SISKM 19 3S .239 FL IL*-900/*6UO 


A144U9 


bi494- J499 




RcsISlOH 90.29 IS .I23> F |L*0*-IOO 


*i4M4o 


0693-2933 


1 


tlSI^rOR 242 51 .25W FC rC*-400/4400 


A14Ai7 


04IK3-Ivi5 




RlStSlOR 109 3i .239 FL 1(— 9002*700 


*l4Hi> 


04*J-JU4> 


i 


JU5I5IUF JOJK 5* •25H FC )i.**AD0/*4Da 


*44«uy 


U4l0-3«i74 




Ac:»IWQR 5K 51 .254 FC 1C*-400/»700 




0 7 37-0992 




Rr5l5l(M ItM IS •UMi f 


Ai4«4t 


07 57-0442 




RtSISlIK 109 11 .1239 F IL*U*-100 


*14«41 


044i-47i> 


i 


RLSUIOR *79 31 ..39 Fb IL— 90 02 * 600 


414H4J 


0 6 83- 2U33 




201 5i .254 1C lb»*400/4A0i> 


A14a44 Aa 


0 6 83- 2086 


3 


HCtl&IOl 7M 54 .25a Ft fC*-tfOJ/»l lUJ 


*44«4» 


0»i3- L04V 




RbsISIOR lOM 38 .239 FC T<.>-9J02*1100 


*14A4» 


<1693-1063 




■e^l&ItJl IJl »C >254 Fb K«-500/»lli>0 


A14H4/ 


36 96-9973 


t 


Hl, 5I5IW 9.741 11 •U5A F fb«UF-100 


A14A44 


0 7 3T-0907 


1 


RlSISIOl >829 II .1239 F IL>0*-I00 


«l4gi 


I9C4-007J 


2 


iindfc-AlRAT 


A&4M 


49C^0o/0 




Dlggi-AIIUT 


AI4Ui 


l»<6-047l 


d 


IL OF AMR LOW-DRIFT TO-W 


At 404 


|I»a4-Q40V 




1. AO 3I6J OF ANF 


A1404 


l««0-02o3 


i 


Jb» A4FL* gPLlAl lUNAL 


A14U4 




1 


U >59 vOlPAiAfim 




>04bH4«4J 


2 


CUlACTUl* F.(.« bbAiM 




>bCBH9u4J 


4 


FINiF.C. 9<I-HJ LAlRALlo. 



Mfr Part Number 




iMi-stia 

I90l>03*0 

lt»3-0020 

2N9)«1 

l•»V003) 

iM»-n4e 



CS10S 

Clidlf 

U7*-l/l6-k-1002*J 

c^i/a*io-4Wi*F 

C«*l/»>ro>tQOt*F 

C*-t/«-T0*r»O2>F 
Ck'i/a* ro>22ii>F 

ro-t»$ii*F 

caioj* 

Ct22»t 

tJ»0-l/*>C-19«2-F 
C4-l/a- IJ-aJil-F 

C*-Ua-fB-lOJJ-F 
c*-l/a- 19-3011 -f 
C*-I7a-I0-6«R -f 
C4-i/a-ii>-a«i -F 

12T4-l/26-»-lJ0Z-a 
C4-l/a- 10-4641-F 
caazis 

CB103S 

C81033 

CNF-»$-l. I-i 
HF »2C-I 
CajTjS 
(9392$ 

■F 52C-I 

(9F-S5-1. r-i 
C*-l/»-l9-»922-F 

C4-l/a-fO-4022-F 

Cai02> 

c*-i/a- ro-4022-F 

(92933 

(ai033 

(83093 

(93023 

(9-i/a-fg-i032-F 

C9-l/a-I3-l002-F 

(99733 

(92033 

CB2069 

C9IU93 

(91063 

F9(33-l/a-r0-17el-F 

(9-l29-tJ-1933-F 

1906-03 70 

1406-0070 

0P-07CJ 

aU316J 

79l((009 



>090- u9«> 
3000-9091 



6A SEE NOTE ON SCHEMATIC 6. 

AB SERIAL NUMBERS 1B22AOS731 ANO ABOVE SEE NOTE ON SCHEMATICS. 



8-144 














Model 34S5A 



Section VIII 



Raploceobl* Porti 



Reference 

Designation 


HP Part Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


A1ft 


OMH-SSSn 


1 


PC ASS6M61V. AC RMS 


284*0 


034SS-86SIB 


A1SC1 


ono-0121 


8 


CAPACITOR-FXO .lUP nO-SOI tOIBVDC CEN 


284« 


0160-0121 


A16Ca 


0I20-00S6 


1 


CAPACITOS-FXO 027 UF 300V 


284M 


0170-0068 


AIK) 


0I7O-0O3S 


1 


CAPACITOR-FXD .77 UF 200V 


2*460 


0170-0038 


A16CA 


ono-3os4 


1 


CAPACITOR-FXO .lUF '-lOk 100WVDC CER 


78460 


0160-3004 


A16C5 


0n0*3l34 




CAPACiTOR-FXO OHX «-10« fOOWVOC CfR 


28460 


0180-31)4 


AIKS 


ono-20X 


1 


CAFACITOR-PXD 7B0PF •'-6% 300WVDC MICA 


264W 


0180-20M 


A16C7 


OIBO-23W 




CAPACITOR'FXO 100PF *-8% 300WVDC MICA 


2*460 


ono-2204 


Aisca 


OISO-OIS3 




CAFACITDR-FXO .033 UF 30OV 


28460 


0100-0183 


AIBCS 


oiao-aen 


1 


CAFACITOR-FXO 37 UF *-IO« tOFIVK MET 


284M 


0160-3886 


Aiftcn 


OISO-22SA 




CAFACITOR-FXD 30FF •-6S 500WVOC CER 


28460 


0160-27*4 


AIK>2 


0140 -one 




CAFACITOR-FXD 300PF <-B« SOOIWOC MICA 


72IM 


OM18F2O1JO30OWV1C* 


A1KI3 


0160-2717 




CAPACITOR-FXD 10PF *-8« 900WVOC C6R 


264K 


0160-2267 


AIKlfClS 


oieo-02si 




CAFACITOR-FXD 1UF »-IOS 38VOC TA 


66786 


1B00106X8036A2 


AIK16 


0160-2297 




CAFACITOR-FXO 10FF i-l* 600WVOC CER 


2*400 


0160-2787 


AIKI7-IB.C2I 


01 50-01 2t 




CAFACITOR-FXO -1UF n0-30» 60WVDC CER 


264H 


0160-0171 


Alien' 


0160-2217 




PAOOIMG LIST 

CAPACITOR-FXO 10PF «.6% 800WVDC 


28480 


0160-2M7 




0I6O-22M 




CAPACITOR-FXO I2PF «.8% SOOWVDC 


2S4B0 


0160-2268 




0100-7261 




CAPACITOR-FXO 18PF »-6% eOOtWDC 


26480 


0180-2261 


AIK23.C}* 


ono-0121 




CAFACITOR-FXO .lUF •60-306 60WVDC CER 


264« 


0160-0121 


A16CM 


0160-30* 




CAPACITOR-FXO 346PF 600WVOC PORC 


28460 


0100-30* 


AIKM 


0160-0171 




CAPACITOR-FXO 1UF «*0-7(K 60WVDC C6R 


28460 


0160-0121 


A16C37 


0160-3046 




C^ACITOR-FXO 36PF *-16 800WVOC PORC 


28480 


OnO-3846 


AIK3S 


0160-0121 




CAPACrTOR-fXO .1UF *60-706 90WVDC C6R 


28480 


0150-0121 


Alien, ex 


0160-4460 


3 


CAPACITOR. FXD 10PF 100V 


28480 


0160-4480 


AIK)! 


016^ 3046 


1 


CAPACITOR-FXD 970PF *-1% lOOWVDC PORC 


28460 


01B0-3B* 


AIK32 


0160-7700 




CAPACITOR-FXD 43PF *-8% 300WVOC 


28460 


0160-2200 


AIK33 AP 


Ono-MM 




CAFACITOR-FXO nUF .-tOK 400VOC 


2B4M 


0160-3886 


AIKM 


0I2I-O4M 




CAPACITOR-V TRMR-AIR 74/24 8PF 380V 


74*70 


160-608-126 


AIKM 


0I4O-01B3 


1 


CAFACITOR-FXO 82FF >-$« 300WVOC MICA 


72136 


OM 1 6E820J0300WV 1 C R 


A1K36^ 4a 


0160-2066 


3 


CAFACITOR-FXO OIUF n0-?0» lOOVDC CER 


26480 


0180-2066 


A1KA0 AJ 


0160-0126 


t 


CAFACITOR-FXD 2.2UF .-304 600VOCCER 


284M 


0160-0128 


AIKS1. 2.) 


1M1-00«0 




DIODE-SWITCHING 30V SOMA 3NS 00-36 


28480 


IBOI-00* 


A16CM. B 


1601-0616 




OIOOE*SCHOTT<Y 


28460 


1801-0616 


A16CA6 


1B0t-<XM0 


1 


OIOOE-SWITCH1MG30V 80WA7NS DO-38 


28480 


1*01-0040 


A1BCA7 


1001-0660 


2 


DIODE. GEN PRP 30V 36MA TO- 72 


28460 


1801-0588 


A1KAS. CRB 


na2-w73 




OIOM-ZNR 4.32V 6K 00-7 FM4WTC— 036« 


04713 


SZ 10838-77 


A1KR1I-CRI3 


1901-0040 




01006-SWITCHING 30V SOMA 2NS 00-36 


264*0 


1801-00* 


A1BK1.K3 AA 


0460-0683 




RCLAV.REED 1A 100MA lOOOVOC 8VDC-COIL 


28480 


0480-0083 


A16K7. K4 


046&-0683 




RELAV-REED 1A 100MA 10QOVOC 8 VDC-COIL 


28480 


0400-0683 


Altai 


1864-0071 




TRANSISTOR NPN SI FD-30QMW PT*200MHZ 


28480 


1684-0071 


AIKU-OA 


1866-0420 




TRANSISTOR .l-FET 2N436I N-CHAN O-MOOE 


04713 


7N4361 


AIIGS 


1686-0063 


1 


TRANSISTOR 7-FET N-CHAN O-MOOE SI 


2*460 


1888-0062 


Alios 


1164-0071 




TRANSISTOR NFN 01 FO*300MW FT.200MHI 


284M 


1884-0071 


AIK1> 


1163-0020 




TRANSISTOR FNF SI F1>300WW FT-IIOMHl 


28480 


1863-0020 


Altos 


1166-0420 




TRANSISTOR ^FET 7N4361 N-CHAN D-MODE 


04713 


2N4301 


Altos. 011 


1864-0763 


3 


TRANSISTOR. A0618 


28480 


1864-0763 


Allot: 


1693-0030 




TRANSISTOR PNP $1 Pp*300MW FT-160MHZ 


28480 


1863-0020 


AII013 


1664-0071 




TRANSISTOR NPN SI PO-30CMW FT»200MHZ 


28480 


1834-0071 


A1IQ14 


IB63-OOIB 


1 


TRANSISTOR FNF 2N*17 SI F0400MW 


07263 


7N4017 


Alton 


1864-0316 


1 


TRANSISTOR NFN SI FO*360MW FT.300MHZ 


04713 


sP5 3en 


AII0I8 


1684 0071 




TRANSISTOR NFN SI FO-300MW FT«200MHZ 


26480 


1334-0071 


AIBQI7 


1K3-0030 




TRANSISTOR FNF SI FO>300MW FT*1B0HHZ 


28480 


1663-0070 


Alton 


1866-0081 


1 


TRANSISTOR 7-FET 2N62* N-CHAN O-MOOE Si 


01286 


7N&248 


Alton. 020 


1866-0430 




TRANSISTOR i-FET 2N4361 N-CHAN O-MOOE 


04713 


2N4301 


AIBAt 


0603-1038 




RESISTOR 10K 614 .2SW FC TC*-400/'7M 


0II2I 


CB1036 


A1BPI2 


06^-7238 




R65ISTOR 22K 6% .26W FC TC--400/nOO 


01121 


CB223t 


AIBN3 


06*3-6148 




RESISTOR 6I0K S« 2SW FC TC*-600/>600 


01121 


CB8148 


AIIM 


06*3-2738 




RESISTOR 22K 614 MW FC K--400/n00 


01171 


ca723t 


A1tM 


06*3-8146 




RESISTOR 810X S« MW FC TC*-800/nOO 


01171 


C831* 


AltM* 


OaOt-4470 




PADDING LIST 

RESISTOR 696K 1% .178W F 


24846 


C4-1^ -70-6601 -F 




0787-0444 




RESISTOR I21K l« 12SW F 


246* 


C4-1/8-T0-1212-F 




0086-4308 




RESISTOR I6.8K 1« I26W F 


246* 


C4-1/8-TD-1682-F 


A1SA7 


0767-04* 


1 


RESISTOR 20K l« .I2SW F TC*0<- 100 


03292 


C4-1/B-T0-8*R-F 


AlfiAB 


0066- *83 


1 


RESISTOR 160K 1% 128W F TC*0*-?8 


07716 


CEA-883-N330 


AW* 


06**- 3382 


1 


RESISTOR 402 l« I2SW F TC*0«- 100 


24848 


C4-l/a-T0-40n-F 


A1SA11 


0«S-3n8 


1 


RESISTOR MIX 1« I26W F TC^-1X 


246* 


C4-1/8-T0-28I2-F 


A1IA17 


06*3- 7466 


» 


RESISTOR 2.4M S« 2SW FC TC--600/*1l» 


01121 


C824K 


AHA13 


0*6*- 3466 


1 


RESISTOR 287K 1% 126W F TC-M-100 


24846 


C4-1/B-T0-2873-F 


AUK14 


0683-1036 




RESISTOR lOK t« 26W FC TC •-400/'700 


01121 


C81036 


AiBRn 


0663-n3B 




RESISTOR 22K 6« 2tW FC TC*-400/n00 


01 121 


C87238 


Attitn 


3100-3161 




RESISTOR TRMR 20K 10% C SIDE-AM 17-TRN 


32887 


3006P- 1-703 


A1SfM7 Ac 


3100-3066 




RESISTOR-TRUR 6K 10% C SiDE-ADi 17-TRN 


037* 


SOOtF- 1-302 


AIIRIB Al. an 


0666 PM 




RESISTOR 732KI% I2SW F TCW>«- 100 


03282 


MCKI/t-TO 7323-F 


A16A1I 


0787-0417 




RESISTOR S62 1% 12SW F TC*<-IOO 


24846 


C4-l/8-T0-t82R-F 




06C3-1646 




FAOOING LIST 

RESISTOR nOK 6% 2SW FC 


01121 


C81648 




0683-33* 




RESISTOR 220K 6% 2SW FC 


01121 


C32246 




06*3-7446 




RESISTOR 240K 6% 26W FC 


01121 


C824* 




06*3-3046 




RESISTOR 300K 6% 26W FC 


01121 


C830* 




0063-3646 




RESISTOR MOK B% MW FC 


01131 


C83B* 




0*63-8146 




RESISTOR S10K 6% 26W FC 


01121 


CBtl* 




06*3-7646 




RESISTOR 7SOK 6% 2SW PC 


01121 


CB734t 




0683-1666 




RESISTOR 1.SM 6% 26W FC 


01121 


C61868 


Aittu: 


07I7-040T 


1 


FIE&ISTO* 100 t% 128W F TC-0*-100 


248* 


C4-t/8-TO-100R-F 


AA SEEN0TE0NKHEMATIC3. 
AC SEENOTEONKHEMATIC3. 










Aj SEE MOTE ON SCHEMATIC 3. 
AL.AN SEE NOTE ON SCHEMATIC 3. 











AP SEENOTEON$CHEMATIC3. 



8-145 










Section VIII 



Model 3455A 



RapioceabI* Ports 



Reference 

Designation 


HP Part Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


Ac 


06S3-1MS 




RESISTOR I00KS6 3SW FC TC*-400/*600 


01B07 


C8I04S 


AIBA24 Ac 


0683- 323S 




RESISTOR 23K S% WM FC TC*-400/»900 


01121 


C8»3S 


A1»R» 


0696- Ton 


3 


RESISTOR lOOK 1% .I3SW F TC*Or-2S 


00202 


NEU 


AISR3S 


ae96-44n 




RESISTOR I67K 1« ITSW F TC^-IOO 


34S48 


C4-1/8-TO-tt71-F 


A1«R27 


0M-a27S 




RESISTOR 4.00K 1« 125W F TC-0*-100 


24S4S 


C4- I/6-T0-4981-O 


A18R» 


3100<^16l 




RESISTOR-TRHR 20IC lOK C SIDE-ADJ 1T-TRN 


33997 


3006P-1-203 


AISU1 Al, AN 


0660 63S0 




RESISTOR 732K i% .125W F TC*0*>100 


03392 


MCSC-I/8-TO-7333-F 


A1SR33 


OM-0054 


1 


RESISTOR 2.15K IK 125W F TC«0«-100 


34S4S 


C4-I/8-T0-2I91-F 


A18RU 


0«e>)4S7 


1 


RESISTOR 2 67K IK 125W F TC-Op-100 


34S49 


C4-1/6-T0- 2871-F 


A1ftR)4 


0767-0417 




RESISTOR 582 IK 12EW F TC«0*>100 


34S46 


C4-1/8-T0 582R-F 


AISR3S 


0767-0W 




RESISTOR IK IK .12AV F T04*-100 


24546 


C4-1/8-TO-10O1-F 


A1BR3S 


0698-4400 


T 


RESISTOR 649 l« 13SW F TCO-lOO 


03293 


C4-I/6-TO-649R-F 


AISR37 


0683-S100 




RESISTOR SI S» .3SW FC TC--400/«600 


01121 


C8SI0S 


A16R3a.R39 


0683-6105 




RESISTOR 61 5% .3SW FC TC--400'«SOO 


01131 


C95106 


A1SR4I 


0767-0413 


1 


RESISTOR 302 IK 125W F TC«O*>100 


34S4S 


C4-1/B-TO-3S2R-F 


aisra: 


0608-4439 




RESISTOR I 97K It I7SW F TC^-IOO 


24646 


C4-1/8-T0-1871 F 


A16M3 


0606-4476 


1 


RESISTOR 10 7K It .I3SIW F TC^-100 


24546 


C4-1/8-TO-1073-0 


AlfiR44 


0683-6106 




RESISTOR SI St .3SW FC TC--4O0/*S0O 


01121 


C96I0S 


A1SR4S 


0006-4430 




RESISTOR 167K It 12SW F TC>O<-ia0 


34S4S 


C4-1/8-T0 1871- F 


AISRW 


0008-4447 


1 


RESISTOR 380 It 13SW F TC'O>-100 


74S4S 


C4-1/1 TO 280R-F 


AISM7 


07S7 0433 




RESISTOR 382K It 13SW F TC-0«-IC0 


24546 


C4-1/8-T0-3321-F 


AI6A4« 


07S7-0438 




RESISTOR S.I1K It .12SW F TC-0> -100 


24546 


C4-1/8 TO-8111 F 


A18R40 


0666-3379 




RESISTOR 4.99K It .13SW F TC*O>-l00 


24546 


C4-I/B TD-4991 F 


A1&R51 Ac 


3100- 309S 


1 


RESISTOR-TRMR 300 lot C SIDE 


03744 


3006P 1-201 


A1SRS} Ac 


0699 - 6630 


1 


AESiSrOR 20K .1K 126W F TC^-25 


03392 


NE55 


AISRS3 Ac 


0696- 6360 




RESISTOR IOK.lt I3SW F TC^-2S 


03393 


NESS 


AISRM 


0689-3431 


1 


RESISTOR 23.7 IK .125W f TC^-tOO 


03B8B 


PMESS 1/8-TO 33R7-F 


AISRSS 


0606-6330 




RESISTOR SK It I3SW F TC4.-3S 


03988 


FMESS 1/8-T9-600I-B 


AISRSe 


3100-3161 




RESISTOR-TRMR 30K lOt C SIOE-ADi 17-TRN 


32997 


3006P-1 203 


At6R67,RSe 


0683-1S0S 




RESISTOR IS St .3SW FC TC.-400/.500 


01121 


C8150S 


4lAAfte ^4 


0683-1046 


2 


RESISTOR 10OK St 3$W FC TC 


01607 


CB1045 


A1SR41 


0683- I03S 




RESISTOR 10K St 3SW FC TC--400'.700 


01121 


C8I03S 


AIBR62 


07S7-04I7 




RESISTOR S62 It I2SW F TCH7.-I0O 


24S45 


C4-I/8-T0 562R-F 


A1SR63 


0767-0467 




RESISTOR 63SK It .I2SW F TC^C.-IOO 


24546 


NA4 


A1&R64 


0698-6320 




RESISTOR 5K IK 12SW F TC<K-25 


03885 


PMESS I/8-T9. 9001-8 


AISMS 


2100-3161 




RESISTOR-TRMR 30K lOt C SIDE-AOJ 17-TRN 


32997 


3006P 1-203 


A1SR66 AO 


0683-1636 




RESISTOR ISK St .3SW FC TC-~400/>900 


01807 


CB1639 


A1SR67 AO 


0663-1335 


1 


RESISTOR 13K5K -2SW FC TC-<-400/*800 


01607 


C8133S 


A1SR66 


0663 1036 




RESISTOR lOK St 2SW FC TC--400/.700 


01121 


C81035 


A15R69 


0663-103$ 




RESISTOR lOK St -3SW FC TC> -400/.700 


01131 


C8103S 


A1SR71 


07 S7 


1 


RESISTOR 332 






AISR72 Ag 


3100-3122 


3 


RESISTOR-TRMR 100 lOt C TOP 


03744 


3006P-1-101 


A1$R73 


2100-3066 




RESISTOR-THMA 5K lOK C SlOE-AOJ 17>TRN 


01885 


43^02 


A1Bfl74 


2100-3306 




RESISTOR-TAMR 50K lOK C SlOE-AOJ 17-TRN 


33997 


3006P- 1>fi03 


A1BR7S Ag 


2100-3154 


1 


A6SISTOR-TAMR IK 10K C SlOE-AOJ 17>TRN 


03744 


3008P-I 102 


AI6R76 


0608-6782 




RESISTOR 230K .St IP70 MATCHED SET RTS, 99, 911 


28490 


OM 8762 


AtSR77 


0767-0487 


5 


AESiSTOR 825K IK .T2S1V F TC^'100 


24S4S 


NA4 


A16R7S AG 


0757-0280 




RESITOfl IK It 12SW P TCTO.-IOO 


03292 


C4-1/B-T0 1001 -F 


A15R79 


0663 1S06 




RESISTOR IS St 3SW FC TC--40Q/.SaO 


01121 


CB1505 


A1SU1 AM 


0698-6964 


3 


RESISTOR S49K It .1W F T&4>.-ia 


28460 


0606 8964 


AISRO AM 


0696-6963 


1 


RESISTOR IS6K It IW F TO«.-ia 


28490 


0898-6963 


AISRS3 Am 


0696 696S 


5 


RESISTOR I47K It .1« F TC^-ID 


38480 


0808 (wes 


A1 8R84 


0767-0433 




RESISTOR 333K It I3SMI F TC*0.-IOO 


24S46 


C4-T/8-T0- 3321 F 


AISRSS AM 


0686-6966 




RESISTOR S34 It ,1W F TCTO.-I0 


38490 


0668-8968 


A1SR86 


0666-6783 




RESISTOR IS8M .9t |P/0 MATCHED SET R7S8661I 


36480 


D699-S782 


A16R68 


0683-1S06 


4 


RESISTOR IS St ,3$W FC TC*-40CV.S00 


01121 


C81605 


AISRW AA 






FA 001 NO UST 








0666-4306 




RESISTOR IS.SKIt I3SWFTC>0.-I00 


03393 


C4-1/8-TO-1692-F 




0696-3136 




RESISTOR I7JK It I3SWFTC*0.-I00 


83292 


C4-1/8-TO-1782-F 




0757-0448 




RESISTOR 10.2K IK 12SW F TC*0«-100 


03292 


C4-t/e-TO-l682-F 




0606-4483 




RESISTOR 187R IK 126W F TC*0«-IOO 


03292 


C4-1/8-rO-l872-F 




0808 41M 




RESISTOR 10. IK 1K 12SW F TC*0«- 100 


03292 


C4- 1/8-TO- 191 2- F 




0757-0440 




RESISTOR 20K IK 126W FTC*0«-1X 


03292 


C4-1/8-TO-2002-F 


A16R91 


0696-9783 


3 


RESISTOR SET. MATCHED 3M St IP/0 MATCHEOSET 


28480 


0608-8752 








RTS. R9S. R9II 






A1SRS3 


0696-6216 




RESISTOR 3M St IP/0 MATCHEOSET R82. R93I 


39480 


0696-6216 


AISRS3 


0000-0216 




RESISTOR 3a3K St IP/OMATCHEO SET R93. R93I 


38480 


0696-6218 


A16RM 


2100-3311 




RESISTOR-TRMR SOD lOt e SIDE- AOJ 17-TRN 


33987 


3006P-1-B01 000 F 


A18RM 


07S7-3S67 


1 


RESISTOR 005 IK 125VV F TC«0*-100 


28480 


07S7-3S67 


AISRSS AA 


0606 5540 


1 


RESISTOR 1 IMSt 3SWFCTO 


01807 


C81196 


AISRS7 AA 


0683- I04S 




RESISTOR lOOK St 2SW FC TC 


01907 


C9104S 


A1BU1 


1836-0340 


1 


IC.OPAUFL. LFM6 


28480 


193S-0340 


A1BU3 


inO-0479 


1 


1C LM 300 OP AMP 


27014 


LM308M 


A1SU3.1H AH 


1635-0616 


2 


1C 357 Of AUP TO-00 


25480 


163S-0S16 


A1SUS 


1820-0471 




IC-DIGITAl SN740SN TTl HEX1 


0139S 


SN7406N 


A1SOS 


1626-03S7 


1 


1C LF367HOPAMP 


27014 


LF367H 




404M748 


2 


E7CTRACT0R-PC 00 8LK fOLVC 052-00 THKNS 


28480 


4040-0746 




1205-0000 


1 


H E AT $1 NK -SC Ml CON OUCTOR 


28480 


I30S-0090 




1306-0003 


1 


HEATSINK TO-SrrO-39-PKG 


28480 


1206-0002 


A2D A 


ltin-69601 


1 


ASSE MiL V. A E F £ R C NCC 






AA SEE NOTE ON SCHEMATIC 3 




NOT FIELD REPAIRABLE ORDER 






AS SEE NOTE ON SCHEMATIC 3 




REPLACEMENT ASSEMBLY ACCESSORY NO. 1 1 1 77B 






AC 566 NOTE <W SCHEMATIC 3. a, ei 

►*G 56 6 NOTE ON SCHEMATIC a. ***• •,, 


:E NOTE ON 


SCHEMATIC 3 







AH SEE NOTt OH SCHEMATIC 3. 

A| SEE NOTE OH SCHEMATIC 3. 

AK SERIAL NUM9ERS laZAOBTSe AND ASOVE REPLACE$a767-Q2BO (S03a> 



AO SEE NOTE ON SCHEMATIC 3. 



8-146 










• • 




a£R NCL IC2A044I0 




Part SI is 0 reed switch which is used os a voitage breakdown device. 
This part is used on 034SS-66SW Rev. B assembiies only (serial 
numbers 1622A00410 and below). 



The Offset Adjustment is mode by connecting a resistor between 
the unlobeled lead and either the or lead. Refer to Section 
V for the Offset Adjustment Procedure. 



A10. Compontnt Locator Tabla. 



CoiT>0df«rit 


Col 


GomporMni 


Col 


CempoASAt 


Col 


ComoonoAl 


Col 


CoAioor>Fr>l 


Col 


Comoon«>ni 


Col 


Cl 


6 


CR1-2 


6 


J1 


0*0 


01*6 


C 


R1 


A 


SI 


A 


2-3 


C 


3*6 


0 


2 


£*F 


6 


0 


2 


8 






4 


0 


6 


E 


3 


A 


7*9. 1 1 


E 


34 


c 


T1 


6 


S4 


6 


7*8 


F 


4 


80 


12 


F 


7-9. 11 


0 


2 


F 


7 9, 11 


F 


9, 11 


6 


6 


€ 


13 16 


C 


12 19 


E 


U14 


0 


12 


8 


1M3 


0 






17-16 


C-D 


21*27 


F 


5-6 


E 


13 1& 


C 


14 


E 






19. 21 22 


0 


28 29.31 37 


8 


7 


F 


16 


0 


15 


P 






23 29 


E 


38 


c 


8 


c 


17 


A 


16*17 


8 


JM1 2 


f 


3142 


F 


39.4144 


0 


9 


D 


18*19 


6 


18-19. 21-23 


C 


3 


0 


33*36 


6 


45 


E 


11 


c 


21 22 


A 


23 


t 






3749 


A 


46 


P 


1M3 


0 


23 26 


8 


24 


6 


K».J 


A 


4941 


6 


47 


6 


14*16 


E 


26-27 


C 


26'26 


c 


3 


8 


4243 


E 


48 


C 


16 17 


P 


28*29.31 


0 


27 28 


A 


45 


A 


4445 


A 


49 


C-0 


18 


B 


3244 


E 


29. 31 


c 


6 


B 


46 


6 


61 *58 


p 


19 


c 


3^36 


F 


3749 


0 


7 


A8 






59.61*62 


c 


21 


D 


3749.41-49 


c 


4142 


0 


a 


6 






63 


A'B 


22 23 


F 


4$ 


D 


4344 


A 


9 


A-e 






64 6$ 


A 


24 


C 


46 


8 


4M7 


8 










66-69. 71-72 


8 


26 


D 


47 


c-c 


4849. 61-66 


c 


LI 


A 






73 


C 


29 


E 


48 


0 


57 58 


A 










74 78 


0 


27-29.31*35 


F 


49 


E 


69 


6 










79. 81 


P 


36 


8-C 


51 


F 


61-64 


C 










8263 


6 


37 


C*0 


62 S3 


8 


6866 


0 










94 


0 


38 


0 


M*S7 


C 


69 


e 










85 


A 


39 


D-E 


6e>S9.61 


0 


71 72 


D 










86*89, 91*92 


8 






62*63.66 


E 














93-96 


E 


W1 


F 


66 


P 


El 


A 










97 99 


F 










E?{B«<ow K9) 


A*e 










101 102 


6 


VI 


F 


















103 


c 






















104 106 


0 






















106-107. Ill 


E 























106*109 


F 







Ac Serial numbers 1622A01806 ar>d above replaces C4: 0160-01 S4 (.22 fxF) 

RN:0683-2025 (2 K) 

The new values Improve stability in the X2 SAN configuration. 








INPUT 




A13 

03455-66513 
Rev. A 



Aa For serial numbers 1622A02436 and above. The preferred value for C25 was changed from part 
number 0160-2150 (33 pFI to improve frequency response near 10 kHz. 





C‘>iWiGHT 1976 b< HEWI-Err-RaOOJRO CCMiUNr 




Figure 8-H-30. Average Responding AC Convertor Schematic. 

8-149/8-150 

















'M& — 




UU-f-lw 



A15 

Rav. B & C 

(Icutrumant Serial No's 1622A00906 and greater) 




0S45S-66515 
Re«. A 

(Instrument Serial No's 1622100905 and below.) 



Aa 

Ad 

A 

A 

Ag 

Ah 

A| 



Aj 



C37, C38 and H97 have been added and the value of A15R59 has beer' changed from 10 kn to 
100 kn to eliminate transients during autoH'angIng which causa inaccurate "first" readings. 
(Instrument Serial No's 1622A00906 and greater.) 

R89 has been mads a "selected" value to improve the accuracy at 1 MHz. (Instrument Serial 
No's 1622A00101 and greater.) 

C36 and R96 have been added to reduce offset at elevated temperatures, (instrument Serial 
No's 1622A00906 and greater.) 

Relay K3 has been changed to a different type to prevent arcing during auto-ranging when 
1000 V is applied to the input. (Instrument Serial No's 1622A00906 and greater.) 

The values of potentiometers R72 and R75 have been decreased to improve the temperature 
stability of the input amplifier circuity. The value of resistors R81 and R8S have been increased 
to center the pots. Previous values were: R72, 200; R75, 2 K; R81, 5.1 1 K; R85, 562. These 
changes have been made on instrument with Serial No's 1622A00906 and greater. 

The following component changes have been made to improve the down-scale linearity of the 
RMS converter: R17; from 2 kn to 5 kn. R23; from 68 kn to 100 kn. R25; from 25 kn to 
100 kn. R51; from 100 n to 200 n. R52; from 10 kn to 20 kn. R53: from 5 kn to 10 kn. 
These changes have been made on instruments with Serial No's 1 622A051 1 and greater. 

Serial numbers 1622A01000 and above. Replaces 0757-0417 (562 Q) to Increase the zero ad- 
justment range. 

Serial numbers 1622A01806 and above replaces 5080-9080. The new part Is not hand-selected. 
Serial numbers 1622A01656 and above replaces R36: 0698-4450 (324 O) and R95: 0757-0407 
(200 n). R95 provides improved dc compensation. R36 essentially improves temperature sta- 
bility. 

Serial numbers 1622A02256 and above. Added as ac bypass of CR3. 



Al Serial numbers 1622A01956 and above. Replaces 0757-0486 (825 K) to Increase the offset 
adjustment range. 

Am Serial numbers 1522A01206 and above the fallowing component changes were made to im- 
prove Input amplifier temperature stability: 

Old Part No. 

R81: 0698-3382 (5490) 

R82: 0698-4308 (16.9 K) 

R83 : 0698-4429 (1870) 

R85: 0698-4459 (634) 

R71 : See padding list as per Table 6-1. 

A|sj Serial numbers 1622A03136 and above. Improved specifications on U3 and U1 make the ex- 
panded offset adjustment range no longer required. R18 and R31 were changed from part 
number 0698-4540 (412 K) to 732 K to reduce this range and improve stability. 

^0 R66 was changed from 200 K (0683-2045) to 16 K (0683-16351 to improve the first 

reading after switchirtg from the 10V range to the 1 00 V range. 

C33 was changed from .1 *iF (01 60-3581 ) to .22 /iF (0160-3966) to improve accuracy at 
30 Hz. 









L9CATEC 

ccvT" 

«AR «ML 




^TdtP »4(»t 



r^jE NP>*S CCMvIRfFH 
03A»-S6ftlS 



.MTU)B d 



5M55« $€N^ 



NOAMAL AC 



»4V0-p R.1>PL£ 



KCAMP 



,7SV0C 



7S2K 






*e.67 VDC 
AT PULL SCALS 



Cl« 

20p^ 



PULL SCALE NDU7 
AT lOOfZ 



ROOT 



CAr^ 



732R 



i,4Vp 9* (OOM< 
«/PULl SCALE iNROT 



:*2d*P 

'FOOK 



iCHa 

''4^;v 






SH. 

— .NV 



NR4 

S320 



P*9ffV( 



lOOV 
MRl*' — 
'•uo» 



R93 

20^H 



iPCpf 

\ 

. ,jMPh 






5«^p' 



nCM UiTIftl 



lOV 

hM4- — 
FBCV unc^l 



Figure 8-H-31. True RMS AC Convertor Schematic. 

8-151/8-152 



COP"»»i5-T 1976 HE«.ETT-ftiC«4At COWFA*,/ 








A10 

03455«6510 
Rev. C 

NOTE 1 : UNKNOWN RESISTANCE IS MEASURED - 

NOTE 2: REFERENCE RESISTANCE IS MEASURED * 

NOTE 3: K9 IS CLOSED DURING REFERENCE MEASUREMENT 

NOTE 4: K2 AND K4 ARE CLOSED DURING 2-WIRE KO MEASUREMENTS 

NOTE 5: K3 IS CLOSED DURING 4-WIRE KO MEASUREMENTS 



A12 

034SS-66512 
Rev. A 



The value of resietors R7, R8, R16, and R17 have been changed from 4,99 kO to 10 kO to 
properly bias differential amplifiers Q1 and Q5. These changes have been mads on instruments 
with Serial No's 1622A01056 and greater. 



Ab The value of resistor R7, R6. R1 6, R1 6 have been changed from 10 K <0757-0442) to 4.99 
K (0698-3279) end C3 has been changed from .039 (0160-0164) to .0047 fiF 

(0160-01671 to eliminate first readirtg errors. These changes have been made on in- 
struments with serial numbers 1622A04631 and above. 








A11 

034S5-66511 
Rev. A 



A11 

03455-66511 
Rev. B 





A20 

03455-66520 
Rev. A 



Aao 

03455-66520 
Rev. B 



A Serial Numbers 1 622 A01 6956 and above A20 replaces all, part number 03455-6651 1. 

Aa Serial numbers 1622A02106 and above replaces 0160-0820 (.05 |LlF) as frequency compensation 
to supress U2 Oscillations. 



A 0 Replaced with A20 assembly only for serial numbers 1622A05871 and above. 



8-155 
















CO^ftiGHT 



I9?7 BY PACKARD CCAfOMY 



J'4i4lA 









I COMR SlO€“ 16 34se>g-«$9o 

A CKT SIDE 8 



A14 

0345S-66514 
Rev. A 

The value of R44 has been changed from 40 MO to 2 MO to prevent the zero-detect compara- 
tor from oscillating. Instruments with Serial No’s 1622A01056 and greater have this change 
incorporated. 

**6 Serial numbers 1 622A05231 and above the following component changes have been made 
to improve reliability of A1 0U1 5: 

Old Pert No, 

R1: 06B3-4335 (5.1 K1 
R18: 0757-0435 (3-92 K1 
R19: 0757-0421 (8261 
R20: 0757-0442 (10 KJ 
CR2: 1901-0040 
CR6; 1901-0040 






COPyPlOHT 1976 er hcwlett-packaro company 











ua HO. 

4HD «1.0« 



B 



C 



E 




03455«6510 
Rev. C 

A10. Component Locator Tftbla. 



















thGUARD MOTHE>» BOARD 
03499-66510 



lO-'TOUARO 



StOTHFR BOARD 
05455'66S0I 



CONTROL LiN£3 



TDRN 'ON 



POWER 

UP 



I I JAt6> 



U3SA 



TO 0,10,111 



^NTCRRyPt 



PROM 

^UNCtroKU^ 

R9: ^ psy .,’?vk 



MASTER CLOCK 



0<9 

LATCH 



CLK POR 60*b 
SETTINO 



016 

LATCH 



UIA 

LATCH 



'NVCATED 



4M4v 



)MRANY 





SMB 


























NO. 

tm MaTE»(«v 



C32 has be«n changed from 2.2 /iF to .22 fiF to eliminate double entry of front panel keys. 



C46 applies to serial numbers 1 622A01 506 and above. C46 serves to reduce turn-on noise 
causino false Interruots. 

A1 Component Locetoi TeM«. 




DDQGODQQDODQODDDDDGDDDODDDOn 
















COPYRIOMT 



1976 BY HEWLETT PACKARD COWPANY 












































DODODDDQDDDDDDDDQDODOODDDOIID 


















components changed the 03455-66501 Assembly from Rev, A to Rev. C. 



Ag A1U57 has been changed from a standard power TTL to a low power TTL device and resistor 
assemblies A2R17 and R18 changed from 2.2 kfl to 10 kfi to reduce the effects of switch 
contact resistance. This change has been made on instruments with Serial No's 1622A00906 
and greater. 

^ Resistor R69 and capacitor C44 have been added to filter out pulses caused by switch bounce 
to eliminate "double entries" In the MATH mode. Addition of these components change the 
03455-66501 assembly from Rev. C to Rev. D. This change has been made on instruments 
with Serial No's 1622A01506 and greater. 

A1 Componsnl Locitoc TiM*. 



A2 

03455-66502 
Rev. A 



Co'nooi'VRi 


Col 


CofTipcn«f>t 


Col 


Con>pon«(il 


Col 


CompoA«<it 


Col 


Comooflort 


Col 


Componont 


Col 


ci.$ 


A 


CRI 


6 


J1 


A 


Q1-2 


A 


R1-7 


A 


U1 6 


A 


6*9 


B 


29 


c 


2 


6-C 


34 


e 


69 


B 


6-11 


8 


11 12 


B 


IM3 


0 


3 


B 


76 


6 


17-19 


A 


12 26 


C 


13-14 


C 


I4>16 


6 


4-6 


D 


9 


e 


21 26 


B 


2732 


D 


16 n 


c 


16 


F 


6 


0-E 


11 18 


G 


29. 3143 


C 


3348 


t 


iei9 


0 






J 


P 






34 36 


0 


4963 


f 


21 


0 






B 


P-C 






36 


c 


64 71 


C 


22 


0-6 






9 


G 






3739 


6 






23 29 


t 














41-44 


6 






3143 


E 














46-49 


P 






3449 


F 














61 69 


P 


VI 


p 


4t 


P 














61«3 


P 






42 


G 






JM1 


P-G 






6467 


G 






4344 


P 






2 


F 






66 


C 






46 


CO 






3 


D 






69 


P 










1 


1 


Li 


F 






SI 


A 

' 








I I DODDDDODODDDOODDDDDODDDDDDDD L 








CC^«H 



rt 



P«CMAO COMMMY 



1113 ^ 




Figure 8-H-38. Front Panel Assembly. 

8-171/8-172 




























HI- 















Section VIII 



Model 3455A 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 

1 


Mfr 

Code 


Mfr Part Number 






i 


A«mA<iIV» «jy|«Ki ><cs 


H 


y>4y>«»w>yl 


4a. 1 


Ja 




vM'4;;itoy«iAb aJp^ ••'. «lw« 




UU>0>«2 




n.v*w.. /i 


21 


C«PACUuA*r4r« UP*-lw« J9«2t 4A 




J >00103X703342 




t 


j 


4.y«‘6*lw ^y»b>^ lA 


>.249 


I>y0l0»xy020«2 






7 


^.sPA^l |UK«» AU .'jd4. I* 


W«7 


l>y0d2>XV620A2 


4lv> 


y A W* A 


j 


i.4y*v 1 TUK*I Au ••^jA»-4J. 14 


W249 


l>yj224X70i3A2 




y » vi 




4 i*«K*f M* 4y#yu 1* 


Sb2v> 


«>Jy« 25X4221)42 


Au; 


J4 




1 ItiR-pAb •^^yr*-4«. 7A 


>s267 


t>yy224X40)>A2 


AU« 






v*»4C4 r««A-»’Ac 4Ay»»*4A« 4y«iH^ !• 


WB) 


1 >00106X902262 


ftlbV 






c«p*ci lyx-i'A. *:«^yf»-44« /<«d>v i« 


>6«d9 


15i;')st25Xvy20A2 


AlvU 


W”A*«y 




UmPA^MMI'IAI 14 


»26» 


|5yO«24X7033A2 


AivU 


gi 




L«P4. 1 At.' |s*Jl f-| J » 4 JV «. 1a 


SotAA 


J90J 1044 •92912 


AUIa 


y 4 


4 


V.PA.l 1vP-»I^b *-«4. 1. !.*• 


264. y 


6i>y«ouy 


AU44 


j 4 »^w>74 






>4syJ7 


i>bUiy6X9020F2 


Aid* 






U.PAs.4 Ay 4yF*«IJ. I>4 


>«2tf 1 


iSOOi 3>XVOi>A2 


Aiblf 


4 a «4 




i.Af'Av 1 loM-« Ai# 4yrA-4w . (4 


>6269 


I>u3t0>xy03>42 


AUU 


^A.y'Js 4 4 


4 


C4K«;iTjy*lAt« ;^yyy7evJ*4. . .^«y4 At 


0P2E.y 


«>V>SLlUy9 


AUi9 




4 


v«y*cnwA*7Av 4 tit 4b fA 


»2.9 


l>yD^26Xyi)l>32 


Aik.4i 


Jity«u<;i4 




C«P«.4lUA*4AO 4yl«*lv% 47tfOC lA 


>Vd6> 


i>jyia>xvoi342 


Aiw«« 


J44MP*y%9« 


A 


b^PAbl /.uAJAeAy^-ii^. WVn4v .U 


2«4V9 


0160-0424 


Aa«.4« 


A4ty04'*4 




|.A4AC.4t.'««»Av i>V M: I* 


>4269 


ISJoJ WX703542 


A4i»d^ 






bAPACllJK-AM) Iwf *-iy . i9V3L TA 


we» 


1500 105X403562 


A4.«> 


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2o462 


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66280 


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2«4yj 


wloO-2605 


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2o469 


0160-0342 


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A4«rt/*U.V4 




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9N2S9 


1500105X703542 


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264«0 


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22460 


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>.2y9 


1500105XV035A2 


A1C41 


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1 


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26460 


0160-0195 


A1C42 


otacMmt 




CAPACITOA-FXO 1UF 3SVDC TA 


66289 


1900106X909$A7 


A1C43 A| 


Qfi0-0»t 




CAFAC<TOA-FXO 1UF 3SVOC TA 


04200 


1900I06X909SA2 


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0tt0>t701 




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04200 


I500685X0006A7 


AiWMt 


yy 


« 


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0474) 


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AlwiU 


lvyi*y^yy 




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04713 


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2«4«0 


19W1-0050 


A1CK4 


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26460 


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26460 


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26460 


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26460 


1901-0050 


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1953516 


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I9ci*vw>y 




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26460 


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04113 


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AIJI 


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27244 


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27244 


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27244 


09-60-1061 


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27264 


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A 


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7176S 


252-15-30-300 


AI47 


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1 


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27244 


22-04-2061 


Al4« 


S1«4^a4 


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2 7264 


22-04-2161 


A4LI 


9i4y«y4y7 


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99IU0 


2590-26 


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i4d>*oyiy 


5 


TM6*»6l$TtiA PNP &1 TP-IA PJ* A«yM« 


26462 


16>3-0010 


A 4^^ 


4»>4-0^iy 


i 


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04713 


2N2222 


Aiyj 


lAt^OwiO 




rAAHSJSTPP NPh 4M2244 >J ti-l« PP*6yjn« 


04713 


2N2222 


AIWA 


4Atj<»yuiy 




fMAISISTOA PNP SI ?U-U Pp«KyN« 


26469 


1653-0010 


A|y» 


iA&4-o«:iy 




TAANSISTOA NPa iN2AA2 SI fP-lA P0«>0yNA 


04713 


2N2222 


A4y6 


i«4>-(M4y 




TKANSISfOll PW Si fo-l« PP«36yM* 


26410 


1653-0010 


Aiy7 


i«94-Ob^y 


44 


fkkVSISTDA P>^ SJ P0«A2yMA M«|6gAH2 


2646 0 


1653-0020 


AIWA 


i«&>«ou^y 




UA^SIStUK PSP SI PP«3yyH6 FT«1S0NH2 


26400 


1653-0020 


AM 


4«9)-oy^o 




fMNSISrUA PV SJ PP«>2yM« Ft«lS0NN2 


26460 


1653-0020 


A4y44 


lA&HO^y? 


A 


IftANSISVOH Pf^ Si PAKL tJ-220AB PP»M« 


26460 


1653-0409 




0160-3622 




CAPAOTOn-FXO .1UF *60 - »« 10PV0C C€ A 


1 26460 


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aa see note on schematics 
AS SEE NOTE ON SCHEMATIC 10 
AC SEE NOTE ON SCHEMATIC 10 
AQ SEE NOTE ON SCHEMATIC 10 
■ ■ 



8-162 















Model 3455A 



Section VIII 



Replaceable Part$ 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




k49^t}^Jt 




iKANSISIUk PAB >1 JAHl IO-<AdA6 PIiaaOM 


26660 


1893-0439 




l9U~(h^9 




iKAKSiStUM PNP UAHI Td-22aA. BOaaJb 


26660 


1153-0600 








THAHblbTlA^ HNi* »1 bAMl Jo-4^>A« t^UebO* 


20480 


1093-04 09 


Alwt> 


4w»~gAgv 




IKANSISIUA BNP aI OAKl IJ-220A* BU'bUB 


2A480 


U53- 06 00 




ib>i*6AJl 




UA'l&leTOA PNP bl OAIU. |0-<40A4» 


28400 


1893-0409 








THAHalaTOH I'NP al »MaL fU-420A9 PO«b0« 


28480 


1893-0409 


Aigu 


ibai-(K Jv 




tKAN^lbrOk al OAAL r«*-440A» PO«bOv 


28400 


1093-0409 


AlHl 




4 


AtaISlOH C.lta lb .1294 P lb»0»-10w 


16701 


RFbCI/I-TO-6101-F 


AiH« 


u797-g«n 


« 


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26666 


C4-l/0-fO-iOU-F 


AUj 






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19701 


>IF6CI/A-t0-6l01-F 


AlK% 


drjr-UA>} 




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24900 


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AiK9 


g7b7-Ckoi 


u 


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26666 


C6-i/B-ro-2aoi-F 


A4A6 


unr-iiAS^ 




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19701 


HF6(l/S-IO-6IOi-F 


A4«7 


J7S7«b«rj 




AP9I9I0A 9*uU It .12>« P U*oa-L00 


24946 


C4-1/I-70-30U-F 


AlxH 


urs-r-u<yu 




k:alSIUB B.ltK It ,129 b F rtadP-IWO 


19701 


HF6CI/*-rO-6191-F 


AIK9 


gft7'>w73 




K4.91&KJA iowU It .14>» P JC*3b-iOO 


24946 


C6-1/I- TO-IOll-F 


• IaU 


0767-0420 


9 


KPbmUK 790 41 «U9A F l4*0P-100 


26666 


t6-l/»-I0-7S1-F 


Atoli 


07ir->»s0l 


1 


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19701 


"F 7C-U2-I0-151-F 


A4«4i 


J«V0«AAuA 


J 


■rbUIlM i9«U it *1290 F IC^OP-IOO 


24946 


L4-I/8-T0-I912-F 


AiAlA 


07>/»u.*Ay 


9 


UAISIIW 22, BP- It .I29B F t(.•Ua-10C 


24944 


C6*l/8-TO-2262-F 


*|Kl» 


07S7-0200 


J 


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26666 


C6-l/S-ro-l332-F 


AlAi« 


a727*04l9 


i 


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24946 


C6-l/t-T0-eSIR-F 


Atxir 


07S7-(Hb& 


b 


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24946 


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Airtll» 


07}7-0j4y 




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26566 


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*lHi» 


0767-02ES 




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24946 


C6-1/S-T0-1332-F 


Al«2i 


07 2l*0Ai9 




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24946 


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AIM^^ 


07»7-0Bb6 




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2 b66b 


C6-1/I- lO-lDOl-F 








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24946 


C4-I/8-70-1912-F 


AU^A 


07S7-028B 




ACSISIOI I3JK 11 ,126a F ICaO*-100 


24946 


C6-l/H-ro-1332-F 


AlA^b 


0797-0419 




RlblbiUR 941 It *U9M p l«.*0»-100 


24946 


C6-l/*-I0-6SIR-F 


Ai«dO 


0797-OA69 




ALbisim iooR !• *1294 P r:«o«-iuo 


24949 


L4-t/8-70-l003-f 


AlA^r 


0»9d-AAd% 




AiPlblOK iV*K U .U90 F K-O^IOO 


26566 


C6-1/0-TO-1012-F 


AlH^tf 


0797*0^A9 




HL9I9I0R 22.6A It .1294 P It-Oa-aOU 


24946 


C4- 1/8- 70-2 2 62 -f 


A1a^» 


07S7-OA10 


1 


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24946 


C6-12R-T0-301H-F 


A|ft>4 


0797-OAbS 




AbSISlOR lOOK 14 .U9M P U*Je-|OJ 


26566 


L4-1/8-TO-I003-F 


AlM»< 


0797-Q4:«i 




Ht^lblOR 2A 1« *I29N ^ Tb-OP-lOO 


24946 


C6-1/S-T0-2001-F 


AIK}} 


i)7>7-u;:ai7 


1} 


RlilBlUi IK U .129B F ICaja-IOd 


24S46 


C4-1/8-T0-1Q0I-F 


AirtA« 


0797-0^ i»0 




UblStCR IK 11 *129« P rc«JP-lJO 


24946 


C4-1/8- ro-IOOl-F 


AiHiS 


07S7-V4A4 


6 


AeSIStCA lOK 14 *1290 F rC«0P-103 


24946 


(6-l/a-TO-l002-F 


AlAjft 


U7i7-UAA} 




HcalSTOl 2K It .1*90 P fb^de-lOO 


24946 


C4-l/e-TO-2301-F 


A|A)7 


i>797*o«^i 




HPblStOH 2R It .I2S0 P 1t*J»-100 


24946 


C4-I/8-70-2001-F 


A1«M 


J797-U&OJ 




fUalSICW 2R it *1290 f TC-3P-100 


24946 


C6-l/a-T0-290l-F 


AlAi9 


07}7-l>.:«} 




KaSISI)* 2R 1a ,126H F Ka0*-10O 


24946 


C4-I/8-70-200I-F 


AlAAO 


ibia*0w$s 


1 


NtlaUKK-KE9 9 -B 1 H- 9 IP ,l>-PIN-6PtB 


2A683 


laiO-0055 


AU4i 


J7b7-Olv9 


4 


He9l$IOK 21* 9K It *1290 f 7C»0*-100 


24946 


C6-128-T0-2152-F 


AUAk 


<i76T-0i44 




RrSIStCR 2I.4K It .|29a F rC«Ub-|U0 


24946 


C 4-1/8- 70-2 192-F 


AUA> 


0791-OaT} 




AaaISIIM }.u1k 14 ,126a F 7C-0F-100 


26566 


C6-i/a-?o-}ott-F 


AA4AA 


al97-OB*< 




KlitlblA lOK W *12>0 f rteOP-lUO 


26566 


C6-l/a-IO-l0O2-F 


Al4A> 


aAS«-AA»J 


1 


Hi.al}IIM 602 It ,126k F IC'Da-lOO 


24946 


C4-I/8-70-4Q2R-F 


AU4* 


0797- OaUI 




AiaSISTOR lOo It *1290 P TC«OP-IOO 


26566 


C6-i/a-io-ioi-F 


AUAI 


I>79i-UJAB 


1 


RLtlSIOt 36 1 : ,126a F ICa3F-lbJ 


24946 


(6-|/a-IO-}6R0-F 


Ai4Ab 


0797-0407 


i 


A49I91W 20v It *1290 F TC*0 p-I00 


24946 


C4-1/8-T0-20I-F 


Al4A« 


07S7-UAU7 




ktbISrifi 200 It *I29» P IC*OP-IOO 


24946 


c6-i/a- ro-201-F 


AIkH 


0797-04^9 


2 


KLbltlO l*02K 14 .1290 F fC*Oa-loO 


24946 


C4-I/8-T0-I821-F 


Ai«>k 


0797-MtfAJ 




Kl}l6ll»( IK 14 ,I26B F rC‘7F-|00 


24946 


C4-I/0- ro-IQOl-F 


Al)C»> 


i>T»7-Ub2« 




ACal&IIAl 4.02K It *1290 P Tb«0*-100 


24946 


e6-i/a-io-it2t-F 


Al«>« 


07 97-0407 




ftcSlbTlH 200 It .1290 f r«.«OP-aOO 


24946 


C4-I/8-T0-20I-P 


AU» 


J»9«-4i/J 


1 


MtlSlUi 49V l4 *1290 r Itp«04-I00 


24946 


C4-I/I-T0-499R-F 


AU>» 


0757-0«0i 




NkblSIlBl 2R It .U9U p rC*JP-IOO 


24946 


C6-I/8-TO-2DOI-F 


A|Mb7 


0767- UaA} 




RtSISIUH 2K II ,126« F IfOF-lOO 


24946 


C6-l/a-T0-2901-F 


AiA>» 


ki7}7-i>.;«} 




«l6l67tJt 2K It ,126a F rC'OF-lOO 


24546 


C6-1/8-TO-200I-F 


A In >9 


0797-0^00 




AtSISIQH U It *1290 P IC»0«-100 


24946 


C4-I/8-TO-1301-P 


AlHAi 


i>7»i-a<ju 




KISISUM IK 14 .1262 F HaOb-IOO 


26566 


C6-l/t-I0-1001-F 


AlKM 


j7»7-<;a«.4 




HL6I6I0A IK 14 ,126a F IC«0>-(00 


26566 


16-l/a-TO-lOOl-F 


AUb} 


J767-e*K<) 


1 


A.919I4M 790 It *4290 f 70*0*- lOO 


24946 


C4-1/8-T0-79I-F 


Ai«AA 






A^kltllK IK 1 a ,I26b F Ib-Of-IOO 


26566 


C6-l/a-T0-l00l-F 


aUbs 


0797-0*4*0 




AcbUlOl IK It *1290 F lb*JP-IOO 


24946 


C4-1/8- 70-1 001 -F 


a1aa« 


d7}7-(U6i7 




Kb9l6IU( IK 14 ,126a F IfaF-lM 


24946 


C6-l/a-TO-i001-f 


Ai«67 


0797-0^00 




ACtlSTOA U l4 *1290 P T4aOP-IOO 


24946 


C4-I 78-TO-IOOI-P 


Ainss aa 


0767-0U2 




RESISTOR 10K l« .I2SW 


(ozn 


C4-1/V-TO-ICD2-F 


Atnat At 


0767-0401 




RESISTOR 100 1% .12SW F TC>0>-IOO 


03207 


C4-1/S-TO-I01-F 


AIS1 


3101-1973 


1 


SWITCH-SI 7-1A-N8 DIP-SLIOE-ASSY .lA 


11237 


30a TYPE 


AiOl 


lti»-l20U 


2 


IL-OICITAI. 6N76LS06N TFl (.} rtti 1 


01205 


SN74LSOSN 


AiU4 


l«^il97 


7 


l6-OIOttAt kRTattOON til 1 } OOAO Z HAND 


01299 


6H76l$30Y 


AIUJ 


lt20-tU>} 


i 


IC-OlBitAL SN76I6N ITL HEt 1 


01299 


SN7414V 


AiOA 


19^1112 


9 


K-OIOITAI 6H761S76H III Li OOAl 


01205 


6N761S76N 


Alsf> 


1920- i400 




IC-0I61IA1. aNI6L606N III LS HtK 1 


01299 


SN76LS05N 


Aa see » 


DTE ON SCHEMATIC 1( 










A| SEE NOTE ON SCHEUATfC 10 


■ 









8-163 














Section VIII 



Model 34SSA 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


41J9 




H 


U-JIuKAl KLi**l» tl<« wu«u 


OA74) 


NC3994^ 


«iJf 


lwA\^ I.A^ 




U-Jl.*irAl .*MALS2TM ITL L:» 4H i MCA 


M II II 1 


• NMIS2TN 








l.-dUITU <NruSu*A III l» HK 1 


vrnn 


SN79LS09N 


A4*.»V 


i««>^l9>J 




SU->IU4fAL HCA961P ru« goA8 


Hsm 


NCi**lP 


Aisliv 






ll-3ll>.lia <N/*lS0V> III 1* HlX 1 


UU9S 


SNT4L SO*N 


AltJU 


K.-O-tl lu 


29 


i:-0ll4|1Al ^NlAtAlYfaN ftL lS M£A 


4129S 


SHT*L SlTlN 


AaJU 


4« 




K-3l>.ITAl HCi**tP III* WU*U 


MI13 


NCJ491P 


AiJi* 


l94fi*UJl 




U-UlullAl <NI«l*<MN m L< JJAJ i MO 


0129S 


SN79LSD8N 








l4->lblTAl aN^AtaOOM III l> gUAg 2 HA*iO 


0129S 


sNinsoiM 




l*e^4 H9 




lt-)lg|rAL SN7ALS03N tU Lfa OUAU 2 ^AMU 


01299 


SNT*l S03N 








K-Oli*ltAL faA74lfaej44 UL La MAj 2 HAHV 


0U9S 


SNI41SQ3N 


AlJxl 


k«/w-UVJ 




IC-l|l<ll«l *1f»LS03S III IS 2 ‘<*ND 


U129S 


SN79LS08N 


AiJle 






IC-JIbITU SNI4LS0M III IS <OAU < •IMJ 


0129S 


SNI4LS93N 


*4 Ji« 


l•4^^449• 




ll-OI<<ll*l III 1* HEX 


0429S 


SNT41S1T4N 




l«4k^4l^6 




ic-3lVfjrAi. jHIalisUmh ra \.> hkx 


0129S 


SNI41S1T4N 


44JAS 






U-3IUIUI SNt«lSI<3« III 1* gu*0 1 lus 


0429S 


SNl4lS12$H 




lAAKl^wll 




ll-riigiTU 111 1* MJilU 1 JU» 


UI29S 


SN79L S429N 


44 J«> 


luiQ-Ufts 




j;-g|g|IAl «N7faifa|74N ML bfa HfX 


0I29S 


SN741S174N 


AiJ^e 


4«2i>-4Wa 




U-OIClfAl aNf^LSUAN tXL IS HkA 


01299 


SNIHSt I4N 


«IJ4> 






U-OlbllAL .NIMtlTM III 11 HEX 


0IZ9S 


SN79LS1 79N 


ALj/it 


l•4i4-IU^ 




i:-IIISIIAl MI«IW*N 111 1* [>g*l 


01299 


SN79LS79H 




|9 JA-«/«/7» 




01006 AMAAY 


2IA80 


1906-0079 


Ai^40 


U2i>-l46a 




ll-UiCIIAl ^NIlLXlAtK TIL IS 


04299 


SNT41$IB1N 




ieA0-ii9o 




IC-3ICII*l SNI*iSII*H III IS HEX 


01299 


SNI41S174N 


AIJ^U 






IL-mbllAL ShlSlSlSlN III IS 


0129S 


aN7HS181N 


Al^ai 


4AA>*n9A 




U-016ITA4 3H741S174N flL ta a6A 


01X9S 


SNTHS174M 


A1J4C 






IC-3ISIIM SNTIISJ2N III IS OUAJ 2 OH 


01299 


SNT4LS32H 


A4 Jjj 


lA^UlA 


2 


IC-3|glTAt 8N7Aifa4)8M Hi L& S 


0129S 


SN741S13IN 


*iv>4 






U'OIOIIAI SN/IIS12SN III L< 00*0 1 aUS 


04299 


SHI4L$12$N 


A4s«A> 






iL-3lbil*L INIILSUSN III IS vUSO 1 BUS 


0U9S 


SN741S12$N 


Aii»B 




2 


l&*JICII*L ShTHSIkSN III IS BIH 


0U9S 


SN79LS169N 


AlJ^7 


IA^4«>2 




U-OICltAL &n;ALSU 3N ffL IS 0iH 


01299 


SN741S143N 


A|g>o 






IC-OIOITAL ^N74ifa08N 1 7L Lfa gUAO 2 AMD 


01299 


SN79LS06H 


A|J>* 


402(Kli99 




ll-SIOIIAl MIllSOM ITL 4.S HlX 1 


04299 


SN79LS09N 


A4JM 


48211-4142 




U-OiulTAL aH74Lfa7AN 7 7l. Ca gOAL 


012*S 


SN79LS79N 


A4JA4 


I02kj-U1A 




IC-JlGltAL fa*irALfal38«« m LS 9 


0129$ 


SN74LS130N 


AlJ^< 


48^4>4S 




K-3lg|tAl faNIAL&429N TU LS gOAO 1 80S 


01299 


SHT41S12$N 


Al J<»i 


l0 2kH IbOA 




Il-OIGIUI SHrHSI2SN IIL IS O0*0 1 BUS 


0129$ 


SN79LS129N 


AiJA^ 


i fa 18-01 99 


2 


1C AN9112A^ U 8AM NHJi 


3*33$ 


4H9112XPC 


AiJA» 


4« 18-0199 




ib AM9442AK 48 RAM N"Oa 


1A33S 


AN9412AK 


A|J«H. 


1«20*4*V« 




l.-DISIIAl SHTHSOSN IIL LS OOAU i NMO 


04299 


SN79LS05N 


klotT 


IDJO-I^JI 




IC-JlvITAL SN74iSg8N TU IS UOAO 2 AND 


0129$ 


SN741S0W 


A4««4A 


IAaO-IA^A 


4 


IC-3S&JTA4. aN74LSl2TN TU LS OOAL 


04299 


SN79LS42)N 




U20-il9) 




ll-)liill*l iNIHSOlN III IS HEX 1 


01299 


SN79LS09N 


A4i^>w 


tS«<-t.4T 




IC-3lt*iTAL iN7AiS00N ITt LS OOAg 2 HAND 


0U9$ 


SN74LS00N 


AIU»A 


1820-1496 




ll-DieiTAl SHI*LSil*N Til IS HEX 


01299 


SN794.S1 79N 


A|<ia^ 


IBM-tlTy 




IC-OlbJTAL SN/aASOaN ML Lfa rl6A 4 


04299 


SN74LS04N 


A1J»> 


I 02 O-I 4 O 6 




II-3I0ITAI SNIILS2TN IlL l< TBL 9 MM 


01299 


SN7HS2 7N 


AiJ^A 


4fa2<^4496 




K-OICITAl SHTHSITIN III Is HEX 


0129$ 


SN79LSI79N 


AiJd» 






IC-OICITAL aN74LS00N TU Lfa gOAO 2 NANO 


04289 


SN79LS00N 


AlU>o 


4a«i>-44fa9 


2 


Ik-OlbllAl SNIHISISSH III IS UUAL t 


0129S 


SN741SI S$N 


A4J«»7 Aa 


itf^o-oee? 


4 


1C ENCOft TTl 1 e-INP 


02237 


S3L18PC 


AlJ9a 


4820-1196 




IS-SICITAl SNTHSllHN III IS HEX 


01295 


SN741SI 74N 


Aik»^ 


14<I^U)8 




IC-dieiTAl SNI41S0SN III LS oOAO 2 NANO 


0129$ 


SN741S03N 


Ai JoO 


4820-4198 




lv-OI»lt*l sNTHSUM IIL IS O0«0 2 NMO 


04299 


aN79iS03N 


AlJAe 


i»^>>-u«r 




iL-OlolTAL SN/ALSMN TU La wOAO Z NANO 


04299 


SN79LSOON 


A|g«^ 


4821^1609 


i 


U-OICIIXl SHTALSIBN III IS * 


0129$ 


SN79LS96N 


A1 JQ> 


K«ii-ll1& 




ll-JICIIU sNNLSi:*N III is HEX 


0129$ 


SN74L S1I4N 


A4064 


I820-4a9> 




JC-3fCJTAL »N?HS4SSN TTL IS DUAL 2 


0129$ 


SNI41SI$$M 


A li/69 






K-3tStl*l SNTHStrsN III lS hex 


0129$ 


SN741S1 74N 


A4 JM> 


l« <0-119* 




ll-OllillU. sNT*lSIT*N III LS HEX 


0129$ 


SN741S174N 


Aii/oT 


1820-4199 




IC'SICITAl SNT41SIT«H III IS HEX 


0129$ 


SN741SII4N 


A|t>6« 


4»«0-449fa 




IC-OICltXl SNI4LS1T4H III IS HEX 


0129$ 


SN79LS4 79N 


■•UuS 


l<t2>lt«* 




Il-OICIIBI sNIHSITlH III IS HEX 


0129$ 


SN741SIT4N 


A4il/U 


4820-1499 




IC-IICIIXl SNI*lStr*M IIL IS HEX 


04299 


SN79LS1 79N 


Aiort 




1 


IL-IUITAL uS«»*3N HOS* OsPl ORVX 


2ID11 


0$«8»3N 


Ain 


0A4O-4i>04 


1 


iHlSKlt WUXillE IJ MHZ 


28980 


OA 10- loot 




l2iM-0A«b 


1 


SJSxEiiic 14-PIN PI nouniiNe 


26969 


I20»-0*I$ 




t^M-0<i73 


i 


W;A61-IC Ib-Ll/NT Oi^-SLOM 


26980 


4200- 097J 




UJCIHOUO 9 


2 


•uOS gAA-N82i 


00000 


oeo 




0i«i^0*«T 


7 


•BOS HW-NB23 


ouooo 


080 




S0*u-0tlu 


2 


OJIJ62AUO-1N 8C (HJAMg 


28980 


9090-0170 



Sft NOTE ON SCHEMATIC 10 



S-164 




















Model 345SA 



Section VIII 



Replaceable Parts 



Reference 

Designation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 




0i«»^4i*>02 


1 


p; AS»«H6Lir> OlaPLAT 


26943 


03933-4*302 


AACHI 


i9«>-0)A7 


36 


Ic3-VIS1M.£ LU9-lNT*2nC3 l»«20«tA-NAl 


20400 


1660-03*7 




IV«^0>a7 




UD-VIS1M.C LUn-lNT«2MC9 |f*20HA-RAX 


20400 


1991^0647 


A2LIL* 


i9«o-a5*r 




UJ-VISiSLt lUn-INT*2nC0 IF«20NA-MAJt 


20400 


1660-03*7 


A<wHi 






U2-VISIM.6 LU«6-1NT»2HC0 |f*20NA-MAA 


20400 


1990-0947 


A2CH& 


iyw-o»A7 




Ui)-V1S16LE UIH-INT-2ACJ IF-2iJNA-<<AX 


20400 


1*60-0397 


A2CIU 


i9W-u»«r 




Lcrf-VISItll lU»-<Nr«2HCU iF-iUHA-HAX 


20400 


1660-0397 


A2LHf 






LcO-V|$|4Lfe LJ»-lNra2MCO 16*2 JNA-MAX 


20400 


1990-0647 


A2CM 


ikso-u:>*r 




UO-VISItLE UJ>»>IHr*2<ICU iF«23l<A-MAX 


20400 


1660-0397 




L9W*0aAI 




uo-vuieu LUH-|Nf*2MC0 |fa2JH*MnAi 


20400 


1990-0647 


A2CHAJ 


l99ii~0S9f 




UO-VJSIALC LUf*-JMT«2HC0 l^«20M*-9AX 


26943 


1660-0397 


AAkHtl 


11W>-0>*T 




iEO-VISlMt lV(^INl«2NC0 IF*20HA-MAX 


20400 


1660-0397 


A^.AI« 


I99^u»«r 




UO-VUIOiC i0M-|Nr«2MCU IP*20(IA-NAA 


20400 


1990-0647 


A2kHlA 


I9SO-OA2 




lEO-VISIAlt iU)»*INTa2MC3 IF»20I<A-NA1 


20400 


1660-0397 


A2b K14 


lV9i^0)A7 




l.t3-VISI6kt Ll2*-INT-2llCa IF>20NA-NAA 


21963 


1990-0647 




19«0-0>A2 




LE0-ViSI6tE lUI^IMTa2HCD IF«20HA-HAX 


20400 


1*60-0397 


A2CHi» 


199^0^97 




lAO-VSSJOLC lUfKIhfeAACU IFe2onA-MAX 


20400 


1*60-0397 


A2CAir 


I99i>0>47 




UD-VfSIOU kUA-lHT«2KC0 1F«20IU-9AX 


20400 


1690-0397 


A2LR16 


I99l^0d47 




L10-V1SSI4C iUI*-lNTa2HC0 lFa20HA-«AX 


26960 


1990-0647 




1990-U>Ar 




LtU-ViSI6kE LUH-INI-2RC9 IF»23HA-AAX 


20400 


1960-0397 


A2U(<a 


1990-0 >4 7 




LbO-VlSlOlE 1U*^IKT«2RCJ lFe20NA-NAX 


20409 


1960-0397 


A^WIUi 


!99<>-ti^47 




UO-VISISU LUM-lMf-iNCJ JF-20NA-NAX 


20400 


1990-0647 




1990- 0447 




itO-VI$IM.E lUK-IHr>2HC0 IE«2<MA-HAX 


20400 


1990-0647 


A2tH2> 


199i^0>47 




U0-VJS1M.C UIM-CNT«2NCD <Fe20RA-AAX 


20400 


1690-0397 


A«kR2* 






lES-VISIMt LUH-IHI>2HCI> IF«20)U-HAX 


26960 


1660-0397 


A2wi2i 


1990-0MT 




U9-V1SI8LC LUN-lNr*2RCJ |Pa20MA-HAI 


20400 


1660-0397 


AJClUk 


19f0-0>*T 




U0-VIS161E LUH-IHT-211CD IF'2<>NA-AAX 


20400 


1990-0647 


A2kA<2 


l990-0>9} 




Ul>-VISI6«.E LI7H-IHT-2ACO IF-«MA-HAX 


20400 


1990-0397 


A2^A^d 


1990-0447 




tCO-VI$IK€ LUM-tNT«2HCO lFa20RA-MAX 


20400 


1990-0647 


A2vli2^ 


199^0447 




ibO-VlSIM.4 tOR-JH7«2ACO 1Fa20HA-flAX 


26960 


1960-0597 


A^UUW 


1990-0947 




Lt3-ViSlM.E LUI»-INT*2nL0 |F«20IU-<UX 


20400 


1990-0647 


A^CtUi 


199^0>47 




LIO-VISIOU L0»-iNf*2»U> |F*20MA-HAX 


20400 


1990-0647 




1990-0947 




LfcO-VtSlOLfc tO»-INI«2MCi> |Fe20MA-HAI 


20400 


1990-0647 


A2CHA3 


19 9k>-094 7 




LtO-VJ$IALC LUn-lNTa2MCJ 1F«20RA-HAX 


20400 


1990-0647 


A2lrA>V 


l99»-0>9r 




LfcO-VISIBlE LUH-iNT«2HC0 IF«20HA-HAX 


26963 


1690-0397 


A2i.K3» 


1990-0947 




LlJ-VlSlftlE LUM-INT-2MC0 1X«20MA-IUX 


20400 


1990-0647 


A2^^1 


1990-0>A9 




OISFIAT-NUM SE6 .S-CKAA .406-H 


26960 


1960-0336 




199U-0»*li 




DiSFkXV-Mtn Stb I-CHA6 .9X-H 


24980 


1690-0390 


A2l>^i 


1990-0940 




D1 SPLAT-MOM S€C 1-CMAX .AJ-H 


20400 


1990-0940 




i990-0>40 




OtSFlAT-NUN SAC 1-CHAK .Ai-M 


20460 


1990-0640 


A2UdA» 


1990-0940 




01 SPLAT-MUM S£6 1-CHAA *4i-M 


20460 


1990-0640 


A2i>lH>-DSMS 


199^0940 




OISPLAY-NUM S«G 1-CHAp *4>-H 


20400 


1990-0640 


A2P1 






NO PART NUM6Cfi:$C€ A?HM 






A2f? 


IKt-4340 




COMNCCTOR 10-PIN F POST TYPE 


27294 


22>01-2tei 




1261-3476 




CONTACT-CONN 0/W FOST TYPE FEU CAP (P/0 P2I 


28400 


1261-3478 


A^Ai 


tlaU-2ut6 




KeSISTA 20J 9t •25» FC TC«-400/*600 


OlUl 


C620I9 


A2A2 


0»«J-2Al9 




K£SISIM 220 SS •2S« FC TC«-400/»600 


OU21 


CB22I3 


A2h> 


044A-2<1> 




AESiSlOK 22b 36 .2»i> FC TC— 9(>(>/*»00 


01121 


C62213 


•2AA 


04 63-3^25 




KbSiSlOA 33 S6 .2Sa FC TC*-«M/*>90 


01121 


CB3906 


A2A» 


0»»3-3A0$ 




AcSi&IOR 33 36 .236 FC TC— 900/*300 


01121 


C63303 


A2HO 


0« 4i-3JJ5 




AlSJSrA 3i >4 *26K FC 7C»-4007*S0O 


OL121 


C63609 


AAH7 


4»S3-3aO> 




A23ISI0R 33 5t .236 FC TC*-9aO/«300 


01121 


conos 


A2nB 


04«i-A40> 




MSISIUA 33 3X .236 FC IC>-9M/*3«0 


01121 


C63303 


A2AV 


04 AI-AaOS 




ALSiSlA la SS •2»b FC fC<-400/»500 


01121 


C033O9 


A2n iCr 


040>-3J09 




RcSISIO* 33 32 .236 FC 7C— 903/*»aO 


01121 


C6M03 


A2Ali 


3«Ea-3jO> 




AtblSIOft 33 36 .236 Fk TC<-9D0/*3O0 


01121 


C63303 


A2AU 


l41iH022 9 




IRl6UKX-AEk 6-PIM-3IP .I-PIN-SPCC 


11206 


730-41-6130 


A2«U 


1410-0229 




l•r60MK-*E3 A-PIH-3IP .1-PIM-SFC6 


11236 


760-8l-Ail0 


A2AIA 


I9i0-0«29 




MiT«(MA-A£S 4-PlM-SlP •1-PlM-SPCC 


1U39 


730-61-6330 


«2Hl> 


1410-0229 




Mcl606K-6E3 6-PIN-3IP .1-PI6-SPCC 


1123* 


73^61-6310 


A2Ki» 


l»li^ 0«2I 




NcTaOlUi-AftS 9-PlN-SIP •1-PIN-SPCG 


11239 


730-61-X330 


A2«iT Aa 


lAU-0206 


2 


6Er60kX-At3 t-PIN-ilP .l-PIM-kPCC 


02443 


7SO-81-R10K 


AMU Aa 


iBio-moe 




NtTOOHK-lUS 0-FIJ6-SIP .I-PIN-SKO 


03483 


7SO-81-610K 


A<il--S21 


9040- 94AA 


26 


PbkHBurtON «6ilCH 


20400 


6040-9464 


A2«l 


6120- 22 »* 


1 


• UtBkE AS3EN811. OiSPUTONCLlTDES Pll 


204 00 


6120-2239 


Aimd 


0)449-ol40l 


1 


CA3LE A33CNBL>. XETAUAaiHINCLUDES P2I 


20400 


06466-41601 




1200-0474 


• 


S«JCXCr-IC 14-CAf OIP-UM 


20410 


UOO-0474 



Aa see note on schematic 10 



8-165 















Section VIII 



Model 34S5A 



Replaceable Parts 



Reference 

Desigrtation 


HP Part 
Number 


Qty 


Description 


Mfr 

Code 


Mfr Part Number 


43 


JAASi-AbiOA 


1 


R.l. A&SENdLY. PRUCk$aJA 


28400 


09499-66909 




034&S-aS603 




REBUILTEXCHANCE ASSEMtLV 


2S480 


03459-89903 


AKl 


oiao-o^to 


1 


CaPACIIOH-fAb 7.}OF«-7J4 19ViK U 


36200 


1900339X001 9A7 


4K^ 






OPACI tOR'FlId 7.JUF*-7i)t 1>V<K lA 


$6200 


1500339X001 9A7 


4>C4 


•ilitO-OUi 




UPACIIOR-FIU ).3\>F*-70( 1>VK 7A 


$6200 


1900139X001 9A7 


4JAi. 42 


i>797-IU*i 




lUalSIlit 7K 1C .t71« 7 IC>d*-lM 


26$60 


C4-l/a-T0-700t-F 


43M3* 






PADOINGIST 










3 


Kc^nick A.«w It .it>a p Tc>j**ioms.ov) 


24$60 


04-171-10-4641-7 




UAM-4181 


1 


RtSUUM 2. *78 U .1Z»H F IC*0*-I0«I4.8VI 


24$40 


C4-l/a-TO-7iri-F 






i 


AsAISIlX 1.9W It .149N F IC«<>*-IO0(4.0VI 


26$40 


C4-l/a-T0-196l-P 




0l>9a-«A7> 


i 


KcSUlUa I.37A 14 .129M F IC«0*-10«O.SV] 


24S60 


C4-l/t-TU-l971-F 




u7»r*o*«u 




R^^IStUR IK 14 .U»l F tC-»*-IOa OilVI 


2i$46 


C4-I/8-7O-I0OI-P 




i)«Va-17gu 


i 


KESlStGR 719 14 .179k F 7C«04- 100 Q.SVI 


24360 


C4-l/a-T0-n9R-F 




0797-U*l» 


1 


■tiisrut 911 It .izsk F rt.*w4-ioua.ovi 


26560 


C4-178-T0-911R-P 


4iJi 






l.-OlulIAL >H7*190«H 1 7L t> WJAJ 7 ANU 


01255 


9N741908N 


43Ja 


144^ U4I 




It-alkItAt 1N74L900H TIL t9 MAl) 7 AND 


01295 


SN74l.90aN 


Aiui 


lll4(Klly4 




U.-0l<iirAL >k7*l90>M Tit t) aJAU 4 RAND 


01295 


9R74LS09N 




I870-U9V 




ll-OlulTAl SN7HS04N TtL 19 HEX 1 


01295 


SN741 904R 


4i0» 


i«2i^uy> 


1 


K-DIcaiAl. aN74l.9l75N III. C.9 WUAU 


01295 


CN74L9I 79N 


43u» 


t«U-02fr» 


4 


• 1C, K0RHHI9 


20600 


lBia-0766 


4iu} 


lSl»-U7»» 


I 


• 1C, H0n-NO9 


20600 


1818-0765 




ISia-CUa* 


i 


• 1C, H0R-NU9 


20600 


1818-0264 


4iJV 




2 


U-DICIIAl KOk 


20600 


1870-16*6 




*U4<>>07*a 


6 


EXTAACrUR-PC ao aik PutTC .U&7-S17-IWN9 


20600 


' 4040-0748 










206«O 





AC S£RIALNl>MBERS1822AOieOSANOABOVE REPLACESOISMtM 

_ I 1 I 



8-166 













Model 3455A 



Appendix A 



APPENDIX A 



A-1. INTRODUCTION. 

A-2. The following section of this manual gives some remote programming (HP-IB) examples for 
the 3455A. These examples are given in the HP Basic (-hp- Model 9830A/B Controller ), HPL (-hp- 
Model 982SA Controller), and Enhanced Basic (-hp- Models 983SA/B and 984SA/B) Controller) 
languages. 

A-3. For effective program writing, it is advisable to write a good algorithm first. Then write the 
345SA program using the HP-IB information in Section III of this manual and the appropriate con- 
troller manual. Most -hp- controller manuals have a summary of the HP-IB messages (usually in the 
HP-IB section) in a tabular form. These messages are written in the respective controller languages 
and are given as sample HP-IB operations. This information and the following program examples 
can be very helpful when you start writing programs for the 34SSA. 

A-4. Program Example 1 1: In this program example, the 345S A is set up to take SO readings quickly 
(with Auto-Cal ofQ and stores them into an Array. Each reading is printed out after all the readings 
have been taken. The 34SSA is then set back to the Auto-Cal mode to insure accuracy. The programs 
in this example perform basically the same functions using different languages. The first program in 
this example is written in the HP Basic language, the second in HPL, and the third in Enhanced 
Basic. 



Example#! (HP Basic). 



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110 

120 

130 

140 

150 



DIM 

CMD 

FOR 

CMD 



R[ 50 ] 
•’?U6"i ’FIR 
1=1 TO 50 
'•?U6- 
3B 




FORMRT 

OUTPUT < 13.50)256>8»512- 

CI1D '■•■'’V5‘^ 

FORMRT E13.6 

ENTER <13j80>Rtn- 

HEXT I 

CMD '•?U6'S"R1- 
FOR 1=1 TO 
PRINT fill 
NEXT I 
END 



S«t DVM to OCV (Ft I, Autorange IH7). Hold/Manual (T3). 
Auto-Cat Off lAOl and Data Ready Off (DO). 

Begin For. ..Next Loop 

Address DVM to Listen, Controller to Talk. 

Formal the Output. 

Trigger the OVM IG6T). 

Set OVM to Talk. 

Format the Output Ireadingl. 



— Enter the Output into Variable. 

— Complete For. ..Next loop. 




• Auto-Cal on to Maintain Accuracy (All. 

Begin For. ..Next Loop. 

Print the Entire Array. 

Complete For. ..Next Loop 
Ends the Program. 



A- 1 




Appendix A 



Model 3455A 



Example K 1 


(HPL). 


0: 


d i n 


fi[ 50 J 


l: 


del/ 


"Doin" 


2: 


w rt- 


''Doi'i" 


O • 
■ 


f' 0 r 


1 = 1 t 


4! 


t rg 


"Dvi'i- 


5! 


red 


"DMii'i" 


6: 


next 


I 


7: 


i.i'rt 


"Dmi'i" 


8: 


Txd 


r — 


9: 


for 


1^1 t 


10: 


r.-rt 


fl[ I ] 




Dimension iKe Array. 

Assign Name to the OVM Address. 

Set DVM to OCV (FI), Autorange (R7I. Hold/Manuai {T3>. 
Auto-Cal Off (AD), Data Ready Off (DO) 

'Begin For. ..Next Loop. 

—Trigger OVM (GET). 

'—Enter the Readirtg into Variable. 



*27; 




Complete For. ..Next Loop. 

Auto-Cal on to Maintain Accuracy. 

Formal the Output. 

Begin For. ..Next Loop. 

Print the Entire Array, 
ompleie For.. .Next Loop, 
lear the OVM (set to turn on state). ISDC). 
Advance Printer 3 Spaces, 
nds the Program. 



Example (Enhanced Basic) 



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50 

60 

70 

80 

90 

100 

110 

120 




OPTION BfiSE 1- 
DIM Volta-^e'-SO.' 

Dui'i=722- 
OUTPUT Dwii "F1R7T2T3PI0D0> 

FOR Ir.dex=l TO 50 

TRIuGER EKv-f'i 



Choose Option Base for Array (see Note). 

Dimension the Array. 

Use Variable for OVM Address. 

Set DVM to OCV CEO. Autorange (R7I. Hold/Manuai (T3). 
'Auto-Cai Off (AO), and Data Ready Off IDO * 



-Begin For. ..Next Loop. 



-Trigger DVM (GET). 

ENTER Dm/'I? Vo 1 Index . „ .. 

T 1 Enter the Reading into Variable. 

NEXT Index- 

OUTPUT Dyfi? Complete For...Next Loop. 

F I XED 6 * —Auto-Cal on to Maintain Accuracy. 

MRT PRINT Vo 1 t g-gi=-~ ^ -Format the Array. 

END— -Print the Entire Array. 

.Ends the Program. 



Note: Refer to Controiler Manuai for Explanation of Option Base 



A-5. Program Example H2: When the 3455A is in the Binary mode, another feature called the 
“Learn Mode" can be used. With this feature, the set-up of the instrument (F1T3, etc) can be learned 
by the controller to be used later on in the program. This can be accomplished by sending the 34S5A 
an ASCII “B“ in the Data Mode and reading the next four bytes output by the instrument into a str- 
ing variable. The instrument can then be reprogrammed to the previous set-up by using the string 
variable instead of program codes. It is important to remember to program the 34SSA into the Binary 
mode by sending an ASCII “B“. The instrument can transfer Us set-up information to the controller 
in the Binary mode only. The following programs show how the “Learn Mode" feature can be used. 
These programs are written in the HP Basic, HPL, and Enhanced Basic languages. 



A-2 




Model 3455A 



Appendix A 



Example #2 (HP Basic) 



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390 
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410 
420 




DIN R[ 10]i.BfC20 
CMD '•?U6". "EY20SYEZ-691 
CND "?U6"» "F1M1T3T3H0R1 
CND ‘'?V5" 

FDRMRT 4B«F6.0- 
ENTER <13»50)B$* 

B*[5]=B$C18] 

CMD ‘'?U6"» "FSMSRZ- 
FOR 1 = 1 TO 10- 
CMD "?U6- 
FORMRT SB- 
OUTPUT (13j 110)256i 
CND "?V5' 

FORMRT F13.6- 
ENTER <13, 140>R[ I ]- 
NEXT I 
FOR J=1 TO 
NR IT 100 
DISP J 
NEXT 



Oimention Variables. 

Store 20 into "Y"arxl -69100 Into "Z" Registers of OVM 

Set DVM to DCV IF1), Scale (M1>. Hold/ManusI IT3I, High 
Resolution Off <H0). Auto-Cal on |A1|, 10 V Range IR31. 
and Sinary Program IB). 

Address OVM to Listen. 

Format the Output. 

Enter Output into String Variable. 

-Enter First Four Characters of Output into String Variable 

Set OVM to ACV (F3>. Math OH (M3), and Autorangs on 
(R7). 




CMD "YUS"— 

FORMRT 

OUTPUT <13,220)B$ 

CMD •'?U6" 

FORMRT 3B^ 

OUTPUT <13,250)256,8,5 

CND 

FORMAT F13.6 
ENTER <13,280)0 
FOR 1=1 TO 10 
FORMRT F13.5 
NRITE <15,310)RC 
NEXT I 
PRINT 

FORMRT F13.0, '•R- 
NRITE <15,350)C' 

PRINT- 
PRINT- 
CMD “YUe- 
FORMRT SB- 

OUTPUT <13, 400)256, 4, oj 
END- 



12 - 




Begin For.. .Next Loop. 

Address OVM to Listen, Controller to Talk. 
Format the Output. 

Trigger the OVM (GET). 

Set OVM to Talk. 

Format the Output Iresdingl. 

Enter the Output of the OVM into Variable. 
Complete For. ..Next Loop. 

Local Controller Operation without OVM. 
— Set OVM to Listen. 

— Format to set OVM into Binary Mode. 

— Sat up OVM to Binary Information in String. 

— Set OVM to Listen, Controller to Talk. 

— Fornwt the Output. 

— Trigger the OVM (GET). 

— Set OVM to Talk. 

Format the Output |resdir>g|. 

Enter Output into Varieble. 

Begin For. ..Next Loop. 

Format the Default Printer. 

Print the Entire Array. 

Complete For. ..Next Loop. 

Skip a Space on Default Printer. 

Format the Default Printer. 

Print Value in Variable. 

Skip a Space on Default Printer. 

Skip a Space on Default Printer. 

Set OVM to Listen, Controller to Talk. 
Format the Output. 

Clear the OVM (set to turn-on state), (SDC). 
Ends the Program. 



A-3 




Appendix A 



Model 3455A 



Example #2 (HPU 



difi 
dekJ 
wrt. 
f fit 
wrt 
flit' 

red 
wrt 
f o r 
t rg 



0: 
i: 
2 : 
3: 
4: 
5: 
6 : 
7: 
8: 
9: 
10 
1 1 
12 

13 

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16 

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19 

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21 
22 

23 

24 

25 

26 

27 

28 



*19550 



R[ 10]!>B$C 
'■Dvfi ">72^:: 
"Dyfi" j 

cl 3# z- 




•'EY20SYEZ-69100S2^ 



"FUZTSHeMlRSBi^ 



"DurVjBf' 

'•Dyf-i‘’» ‘’F3H3R7- 
I-l to 10 
'•Dgfi •' 
red "Du 
next I 
fxd 0 
for J=1 
wait 100 
dsp J 
next J 
wrt "Iiwi'i 





Olmenaion Virlable. 

AatiQn Name to the DVM Addraes. 

Store 20 Into "Y" and -691 00 Into "Z" Regiaters of DVM. 
Format Output. 

Set DVM to DCV IF1), Hotd/Manual ITS). High Reaolution 
)ff (HOI, Scale (Ml), 10 V Range (RSI, and Binary Program 
( 8 ). 

•Reformat to TurtvOn Cor>dition. 

•Entire Birtary Charactara into String. 

Set-up DVM to ACV IF3I, Math OH IMS), and Autorange 
IR7). 

Begin For.. .Next Loop. 

Trigger the DVM (GET), 
nter Output of DVM ^to Variable, 
omplete For.. .Next Loop, 
ormat Output. 

Local Controllar Operation without DVM. 

Set-up DVM to Binary Information in String. 

Trigger tl>e DVM (GET). 

Enter Output into Variable. 

Format the Output. 

For.. .Next Loop. 

Rrint the Entire Array. 



Omplete For.. .Next Loop, 
onnat the Default Winter, 
int Value in Variable. 

iear the DVM (aet to turrt-on atate). (SDC). 
Advance Default Printer S Spacea. 
rvfa tlw Program. 



A-4 




Model 3455A 



Appendix A 



Example M2 (Enhanced Basic! 



10 

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30 

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150 
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181 

190 

191 
200 
210 
220 



OPTION BRSE 1 
DIM Ri-ipI itudt < 1 0) 
D 's' I'l - 7 22^ 




OUTPUT Dyro; "EY20SYEZ-69100S2 - 
IMAGE #»13R^ 



ChoOM Option Baia for Array (a«e Note). 

Dimension the Array. 

Use Variable for OVM Address. 

Store 20 into"Y" and -69 100 into "2" Registers of DVM. 
Format the Output Statement. 



OUTPUT DuM using 40; "FlT2T3H0t11R3B-^®«» OVM to OCV (FII. Hold/MenuaUTSl. High Resolution 
ENTER Dt'i^ J B i no r VT - Off IHOI. Scale (MD. IOV Range IRSI, and Binary Program 

OUTPUT DufflS ‘•F3M3R7:2 . o- 

FOR Index=l TO ____J~Ent« Binary character. .ntoStr.ng. 

TRIGGER P ' ■ II ^ Set DVM to ACV (F3). Math Off (MU. and Auiorange IR7). 

ENTER fli'lpl ilude< Index — -Begin For,. ,Ne«t Loop. 

NEXT Index 

Locol-operation; FOR J=1 TO 50 Y^e„,^ Output of dvm into variable. 

I V. Complete For.. .Next Loop. 

NEXT J i ^Local Controller Operation without OVM. 

OUTPUT Dui'i 5 " B “ > Bi no. ry$ ' -Set-up DVM to Binary information in String. 

TRIGGER Dwr'l Trigger the DVM (GET). 

ENTER Dui'i 5 Reo.di n-g- 
FIXED 6 



MAT PRINT Rnplitude- 
FIXED 



PRINT USING "K'‘ 5 Reading! "H- 
CLEAR DL-'h- 
END- 




Enter Output into Variable. 

Format the Output. 

Print the Entire Array. 

Format the Default Primer. 

Print Value in Variable. 

Clear the OVM (set to tum-on state), (SDCI. 
Ertds the Program. 



Note; Refer to Controller Manual for explanation of Option Base. 



A-5/A-6